Semi-Annual 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 | 
|---|---|---|---|---|---|
| Semi-annual statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                696,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,359,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                28,266,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,978,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -1,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -428,230,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -114,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                294,904,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,274,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of securities | — | 
                                                -4,000,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -6,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of property, plant and equipment | — | 
                                                -1,269,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -789,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                19,322,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -1,524,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -110,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                836,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                734,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -14,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,574,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -864,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -193,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -194,801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -115,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -217,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -135,291,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                43,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,522,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -743,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                984,041,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                4,891,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,634,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,650,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |