Key Financial Data Of Group
| Concept | 2024-10-01 to 2025-03-31 | As at 2025-03-31 | As at 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-03-31 | As at 2024-03-31 | 
|---|---|---|---|---|---|---|
| Key financial data of group | ||||||
| Business results of group | ||||||
| Net sales | 
                                                4,197,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,462,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,313,123,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                336,023,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                246,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                375,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | 
                                                239,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                39,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                319,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | 
                                                251,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                39,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                324,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                1,836,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,582,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,913,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | 
                                                4,794,838,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,271,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,693,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | 
                                                26.84
                                                
                                             | — | — | 
                                                4.38
                                                
                                             | 
                                                35.54
                                                
                                             | — | 
| Diluted earnings per share |  | — | — | 
                                                4.38
                                                
                                             | 
                                                35.50
                                                
                                             | — | 
| Equity-to-asset ratio | — | 
                                                0.372
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
                                                0.357
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.396
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | 
                                                292,412,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                9,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -338,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -273,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -88,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                157,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -222,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -191,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                1,041,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                920,497,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,442,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |