| Concept | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 
|---|---|---|
| Audits | ||
| Fees to primary auditor | ||
| Audit fees - Reporting company | 
                                                67,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Reporting company | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Consolidated subsidiaries | 
                                                30,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Consolidated subsidiaries | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Total | 
                                                98,026,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                89,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Total | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |