Semi-Annual Consolidated Statement Of Cash Flows
| Concept | 2024-04-01 to 2025-03-31 | As at 2025-03-31 | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2023-03-31 | 
|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | 
                                                815,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                28,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | 
                                                5,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                27,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | 
                                                -251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | 
                                                -95,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -450,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | 
                                                725,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -422,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -324,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -290,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of property, plant and equipment | 
                                                2,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                479,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | 
                                                -214,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -60,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -631,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -396,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Dividends paid | 
                                                -521,684,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -312,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                -524,088,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -312,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                -407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -430,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,124,818,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                7,058,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,489,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,614,223,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |