Key Financial Data Of Reporting Company
| Concept | 2023-06-01 to 2024-02-29 | As at 2024-02-29 | 2023-12-01 to 2024-02-29 | As at 2023-05-31 | 2022-06-01 to 2023-05-31 | As at 2023-02-28 | 2022-12-01 to 2023-02-28 | 2022-06-01 to 2023-02-28 | 
|---|---|---|---|---|---|---|---|---|
| Key financial data of reporting company | ||||||||
| Business results of reporting company | ||||||||
| Net sales | 
                                                13,278,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                17,410,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                12,739,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | 
                                                1,528,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,340,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,552,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | — | 
                                                5,479,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,078,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                4,492,706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Total assets | — | 
                                                10,847,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                10,860,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,691,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Basic earnings (loss) per share | 
                                                121.65
                                                
                                             | — | 
                                                56.05
                                                
                                             | — | 
                                                197.80
                                                
                                             | — | 
                                                39.56
                                                
                                             | 
                                                122.41
                                                
                                             | 
| Diluted earnings per share |  | — | — | — |  | — | — |  | 
| Equity-to-asset ratio | — | 
                                                0.501
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.464
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.459
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | — |