Consolidated Statement Of Changes In Equity
| Concept | As at 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2024-01-01 to 2024-12-31 | As at 2024-12-31 | 2024-01-01 to 2024-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Statement of changes in equity | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Net assets | 
                                                60,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,598,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                60,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,048,217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -8,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                744,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                386,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                386,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                745,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                63,568,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,749,422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                358,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,598,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,720,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,424,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,781,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                386,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,547,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                37,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                37,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,193,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,065,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                374,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,599,348,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                4,292,599,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                374,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                733,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,193,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -8,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,822,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                358,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                374,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,699,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                734,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,348,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                34,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,015,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,322,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                210,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                210,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                367,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,918,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,136,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                577,503,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                210,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                577,503,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,139,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,101,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,322,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Changes during period | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Issuance of new shares | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                307,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                307,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                153,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                153,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                153,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                307,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                153,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                307,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                153,819,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Dividends of surplus | — | — | — | — | 
                                                -480,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -480,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                -480,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -480,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -480,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                -480,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -480,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -320,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -320,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                -320,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | 
                                                -320,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -320,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -320,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -320,954,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Profit (loss) attributable to owners of parent | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -694,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -694,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                -694,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                780,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                780,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | 
                                                780,683,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Net changes in items other than shareholders' equity | — | — | 
                                                23,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                4,982,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                91,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                4,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,079,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                62,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                -19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                23,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,011,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,025,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -7,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                21,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Total changes during period | — | — | 
                                                23,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -595,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,982,929,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                11,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -572,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -567,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,927,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,152,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                11,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -1,175,319,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -595,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                23,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                871,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,011,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,806,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -9,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                780,807,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                164,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                164,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                871,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                164,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                459,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,191,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                155,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,212,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                156,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |