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 | 
|---|---|---|---|---|---|
| Statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                1,318,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,088,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                14,221,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,793,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -112,178,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -219,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -38,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -29,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                1,181,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                849,585,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from operating activities | |||||
| Cash flows from operating activities | |||||
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -125,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -132,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                8,796,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from collection of loans receivable | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from facilities maintenance and investing activities | |||||
| Cash flows from financing activities | |||||
| Purchase of treasury shares | — | 
                                                -39,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -237,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -152,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -162,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | — | 
                                                650,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -723,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -991,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -753,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -103,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                326,281,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -134,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                4,451,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,125,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,260,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |