Quarterly Statement Of Cash Flows
| Concept | As at 2024-09-30 | 2024-04-01 to 2024-09-30 | As at 2024-03-31 | As at 2023-09-30 | 2023-04-01 to 2023-09-30 | As at 2023-03-31 | 
|---|---|---|---|---|---|---|
| Quarterly statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Subtotal | — | 
                                                1,084,424,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                603,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                10,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                12,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -50,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -26,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Compensation paid for damage | — | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                667,293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                639,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | ||||||
| Purchase of investment securities | — | 
                                                -1,073,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of investment securities | — | 
                                                984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -679,079,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,723,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | ||||||
| Proceeds from long-term borrowings | — | 
                                                460,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -2,457,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,999,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | — | 
                                                -78,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -89,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | 
                                                -140,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -4,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -75,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                86,922,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                18,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                20,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -68,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -976,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                1,724,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,792,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,591,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,567,886,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |