Quarterly 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 | 
|---|---|---|---|---|---|
| Quarterly consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | 
                                                939,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                513,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | 
                                                91,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                63,642,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | 
                                                -142,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -158,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | 
                                                883,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                414,785,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -303,886,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -203,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | 
                                                -99,870,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of investment securities | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                160,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | 
                                                -765,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                -406,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -42,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Repayments of short-term borrowings | 
                                                -30,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -66,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | 
                                                -236,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -169,921,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                -270,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -186,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                206,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                185,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                2,794,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,588,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,402,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |