Quarter Period Consolidated Statement Of Comprehensive Income
| Concept | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2021-10-01 to 2022-09-30 | 2021-10-01 to 2022-09-30 | 2021-10-01 to 2022-09-30 | 2021-10-01 to 2022-09-30 | 2021-10-01 to 2022-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Quarter period consolidated statement of comprehensive income | ||||||||||
| Statement of comprehensive income | ||||||||||
| Profit (loss) | 
                                                10,334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,826,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,334,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,317,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,076,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,076,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,076,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,076,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | ||||||||||
| Valuation difference on available-for-sale securities | — | — | — | 
                                                2,209,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -588,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Remeasurements of defined benefit plans, net of tax | — | — | — | 
                                                174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                174,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Other comprehensive income | — | — | — | 
                                                2,383,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -414,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Comprehensive income | — | — | — | 
                                                13,210,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,902,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Comprehensive income attributable to | ||||||||||
| Comprehensive income attributable to owners of parent | — | — | — | 
                                                13,210,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,902,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — |