Consolidated Statement Of Cash Flows
| Concept | As at 2025-03-31 | 2024-04-01 to 2025-03-31 | 2023-04-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|
| Consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                624,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                753,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                11,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -41,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -45,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -45,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                548,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                699,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of investment securities | — | 
                                                -100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -1,092,325,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -687,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                48,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from collection of loans receivable | — | 
                                                2,490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -57,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Dividends paid | — | 
                                                -154,317,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -115,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | — | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -674,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -581,490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                89,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                70,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -383,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                107,496,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                978,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,361,969,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,254,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |