Key Financial Data Of Reporting Company
| Concept | 2023-07-01 to 2024-06-30 | As at 2024-06-30 | As at 2024-06-30 | 2023-07-01 to 2024-06-30 | As at 2023-06-30 | As at 2023-06-30 | 2022-07-01 to 2023-06-30 | 2022-07-01 to 2023-06-30 | 2021-07-01 to 2022-06-30 | 2021-07-01 to 2022-06-30 | As at 2022-06-30 | As at 2022-06-30 | 2020-07-01 to 2021-06-30 | As at 2021-06-30 | 2020-07-01 to 2021-06-30 | As at 2021-06-30 | As at 2020-06-30 | 2019-07-01 to 2020-06-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||||||||||||||
| Business results of reporting company | ||||||||||||||||||
| Net sales | 
                                                4,683,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,256,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,555,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,347,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,480,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,831,878,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,346,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,653,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,342,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | 
                                                -318,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -129,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                154,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                329,351,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                887,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                496,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                353,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                87,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                182,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) | — | — | — | 
                                                -305,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                89,409,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                398,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -490,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                131,901,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | — | 
                                                781,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total number of issued shares | — | 
                                                9,155,895
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | — | 
                                                6,517,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                6,517,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | — | — | 
                                                6,517,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | 
                                                6,517,100
                                                
                                                    
                                                        xbrli:shares
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                4,466,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,688,215,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,408,387,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,739,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,518,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,318,978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,429,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,920,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,410,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | — | 
                                                9,218,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,509,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,835,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,271,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                8,140,781,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,691,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,568,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,022,917,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,269,091,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets per share | — | 
                                                487.84
                                                
                                             | 
                                                512.04
                                                
                                             | — | 
                                                522.99
                                                
                                             | 
                                                573.81
                                                
                                             | — | — | — | — | 
                                                539.89
                                                
                                             | 
                                                509.27
                                                
                                             | — | 
                                                372.86
                                                
                                             | — | 
                                                448.10
                                                
                                             | 
                                                523.29
                                                
                                             | — | 
| Dividend paid per share | — | — | — |  | — | — |  | — | — |  | — | — | — | — |  | — | — |  | 
| Interim dividend paid per share | — | — | — |  | — | — |  | — | — |  | — | — | — | — |  | — | — |  | 
| Basic earnings (loss) per share | 
                                                -67.48
                                                
                                             | — | — | 
                                                -34.12
                                                
                                             | — | — | 
                                                13.72
                                                
                                             | 
                                                34.12
                                                
                                             | 
                                                123.18
                                                
                                             | 
                                                61.17
                                                
                                             | — | — | 
                                                42.55
                                                
                                             | — | 
                                                -75.19
                                                
                                             | — | — | 
                                                20.24
                                                
                                             | 
| Diluted earnings per share |  | — | — |  | — | — |  |  |  |  | — | — |  | — |  | — | — |  | 
| Equity-to-asset ratio | — | 
                                                0.4845
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.4930
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.4350
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.4521
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                0.4322
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.4315
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.3699
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.4158
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.4692
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Rate of return on equity | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.0266
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.0613
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.2699
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.1278
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.1115
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.0394
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Price-earnings ratio | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Payout ratio | — | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | 
                                                -386,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                361,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,042,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                837,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -434,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                -792,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -634,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -337,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Net cash provided by (used in) financing activities | 
                                                2,092,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                416,066,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -247,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -380,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Cash and cash equivalents | — | — | 
                                                2,080,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                729,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                835,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                612,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Number of employees | — | 
                                                208
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                314
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                204
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                322
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                315
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                195
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                301
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                179
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                169
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Average number of temporary employees | — | 
                                                10
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                10
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                11
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                11
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                9
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                5
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Total shareholder return | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Total return on share price index | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — |