Notes - Segment Information, Etc.
| Concept | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||||||
| Segment information | ||||||||||||||||
| Disclosure of sales, profit (loss), asset, liability, and other items for each reportable segment | ||||||||||||||||
| Sales | ||||||||||||||||
| Revenues from external customers | 
                                                921,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,390,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,390,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,212,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,183,466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,283,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,994,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,369,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,681,354,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,136,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,024,711,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,293,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,293,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                421,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -421,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                397,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                388,796,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -413,978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                413,978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                2,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,155,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                217,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,514,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                85,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,707,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                90,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                212,781,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                240,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                369,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                250,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |