| Concept | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|
| Audits | ||
| Fees to primary auditor | ||
| Audit fees - Reporting company | 
                                                33,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Reporting company | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Consolidated subsidiaries | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Consolidated subsidiaries | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Total | 
                                                33,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Total | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Fees to network firms | ||
| Audit fees - Reporting company | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Reporting company | 
                                                3,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Consolidated subsidiaries | 
                                                5,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Consolidated subsidiaries | 
                                                750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Audit fees - Total | 
                                                5,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-audit fees - Total | 
                                                3,766,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |