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 | — | 
                                                2,240,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,583,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,035,841,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                -89,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                146,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -36,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                1,611,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,693,584,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,497,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Total assets | 
                                                7,919,991,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,987,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,655,099,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Basic earnings (loss) per share | — | 
                                                -3.52
                                                
                                             | 
                                                4.38
                                                
                                             | — | — | 
                                                -1.88
                                                
                                             | 
| Diluted earnings per share | — |  |  | — | — |  | 
| Equity-to-asset ratio | 
                                                0.203
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.212
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.196
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                192,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                337,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -116,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) investing activities | — | 
                                                -262,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -473,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -328,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net cash provided by (used in) financing activities | — | 
                                                73,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                220,886,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                76,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cash and cash equivalents | 
                                                1,639,043,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,665,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,194,138,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — |