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 | — | 
                                                1,448,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,396,810,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                1,697,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -399,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -359,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -83,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -40,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                1,048,719,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,033,142,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from operating activities | |||||
| Cash flows from operating activities | |||||
| Cash flows from facilities maintenance and investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -34,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Net cash provided by (used in) investing activities | — | 
                                                68,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -68,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | — | 
                                                -851,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -10,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -382,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -294,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -1,212,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -301,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -6,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -22,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -29,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -95,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                663,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                3,994,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,089,380,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,047,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |