Key Financial Data Of Group
| Concept | As at 2024-08-31 | 2024-03-01 to 2024-08-31 | 2023-03-01 to 2024-02-29 | As at 2024-02-29 | 2023-03-01 to 2023-08-31 | As at 2023-08-31 | 
|---|---|---|---|---|---|---|
| Key financial data of group | ||||||
| Business results of group | ||||||
| Net sales | — | 
                                                218,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                425,011,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                208,986,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | 
                                                3,471,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,390,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,426,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | — | 
                                                1,215,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,073,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,166,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | — | 
                                                6,969,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,238,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                11,952,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | 
                                                132,159,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                126,576,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                126,619,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | 
                                                239,082,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                224,240,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                221,919,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | — | 
                                                38.41
                                                
                                             | 
                                                286.85
                                                
                                             | — | 
                                                226.61
                                                
                                             | — | 
| Equity-to-asset ratio | 
                                                0.520
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — | 
                                                0.530
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.537
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | — | 
                                                -2,752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,952,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -6,581,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -8,614,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,465,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -8,677,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -421,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,335,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,024,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                39,428,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                49,597,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                38,939,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |