Key Financial Data Of Reporting Company
| Concept | As at 2024-09-30 | 2024-04-01 to 2024-09-30 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-09-30 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||
| Business results of reporting company | ||||||
| Net sales | — | 
                                                5,115,605,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,379,637,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,990,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                -37,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                115,392,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -23,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                8,209,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,238,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,922,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | 
                                                12,069,938,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                12,577,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,089,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | — | 
                                                -2.81
                                                
                                             | 
                                                117.23
                                                
                                             | — | — | 
                                                52.32
                                                
                                             | 
| Diluted earnings per share | — |  |  | — | — |  | 
| Equity-to-asset ratio | 
                                                0.663
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.642
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.642
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -201,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                659,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                310,789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) investing activities | — | 
                                                -142,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                30,719,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) financing activities | — | 
                                                5,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -61,171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                161,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cash and cash equivalents | 
                                                1,552,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,869,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,760,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — |