| Concept | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | 
|---|---|---|
| Audits | ||
| Fees to primary auditor | ||
| Audit fees - Reporting company | 
                                                29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Reporting company | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Consolidated subsidiaries | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Consolidated subsidiaries | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Total | 
                                                29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Total | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Fees to network firms | ||
| Audit fees - Reporting company | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Reporting company | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Consolidated subsidiaries | 
                                                2,577,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Consolidated subsidiaries | 
                                                647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Total | 
                                                2,577,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Total | 
                                                3,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,766,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |