Consolidated Statement Of Comprehensive Income
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|
| Consolidated statement of comprehensive income | ||||||||
| Statement of comprehensive income | ||||||||
| Profit (loss) | 
                                                569,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                534,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                534,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                534,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                435,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                704,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                435,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                435,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | ||||||||
| Valuation difference on available-for-sale securities | 
                                                -110,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                81,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Foreign currency translation adjustment | 
                                                110,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                100,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Remeasurements of defined benefit plans, net of tax | 
                                                -23,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                58,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other comprehensive income | 
                                                -22,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                240,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income | 
                                                546,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                944,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income attributable to | ||||||||
| Comprehensive income attributable to owners of parent | 
                                                546,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                944,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — |