Key Financial Data Of Group
| Concept | As at 2023-09-30 | 2023-07-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | As at 2022-09-30 | 2022-07-01 to 2022-09-30 | 2022-04-01 to 2022-09-30 | 
|---|---|---|---|---|---|---|---|---|
| Key financial data of group | ||||||||
| Business results of group | ||||||||
| Net sales | — | — | 
                                                4,360,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,296,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,973,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | — | 
                                                158,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -194,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -56,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | — | — | 
                                                91,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -238,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -45,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income | — | — | 
                                                162,796,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -141,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                81,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                6,817,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,721,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,943,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Total assets | 
                                                9,666,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                9,665,870,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,114,007,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Basic earnings (loss) per share | — | 
                                                8.98
                                                
                                             | 
                                                68.65
                                                
                                             | — | 
                                                -178.53
                                                
                                             | — | 
                                                -40.44
                                                
                                             | 
                                                -33.78
                                                
                                             | 
| Diluted earnings per share | — | — |  | — |  | — | — |  | 
| Equity-to-asset ratio | 
                                                0.705
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.695
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.762
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                35,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -69,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                113,479,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) investing activities | — | — | 
                                                -74,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -425,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -259,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -204,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                519,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -112,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cash and cash equivalents | 
                                                1,498,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,696,706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,443,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — |