Consolidated Statement Of Cash Flows
| Concept | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|---|
| Consolidated statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | 
                                                7,075,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                30,623,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,801,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,363,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                3,460,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,275,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | — | 
                                                2,417,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for loan losses | — | — | 
                                                -368,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -971,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Amortization of goodwill | — | — | 
                                                452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest income | — | — | 
                                                -63,857,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -59,510,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | — | 
                                                9,445,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,616,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Loss (gain) related to securities | — | — | 
                                                -253,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                948,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in retirement benefit liability | — | — | 
                                                -265,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -129,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Foreign exchange losses (gains) | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                66,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net decrease (increase) in loans and bills discounted | — | — | 
                                                -165,533,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -142,967,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in deposits | — | — | 
                                                -33,864,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                121,754,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest received | — | — | 
                                                64,267,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,071,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | — | 
                                                -8,126,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,526,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | — | 
                                                9,594,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                162,699,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | — | 
                                                -7,208,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,169,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                2,876,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                156,768,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | — | 
                                                31,677,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,130,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of securities | — | — | 
                                                -214,777,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -217,173,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of securities | — | — | 
                                                234,332,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                205,657,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of property, plant and equipment | — | — | 
                                                -2,076,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,082,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                106,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                107,834,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,657,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Purchase of treasury shares | — | — | 
                                                -2,757,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,428,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | — | 
                                                -6,155,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,115,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of shares of subsidiaries not resulting in change in scope of consolidation | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -8,912,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,543,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                101,797,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                220,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | — | 
                                                1,070,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                968,268,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                747,378,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |