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 | — | 
                                                3,331,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,918,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                27,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -36,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -14,014,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -991,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -941,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                2,367,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,026,857,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -3,565,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,863,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                14,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -11,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -99,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                79,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -4,533,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,270,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from long-term borrowings | — | 
                                                2,120,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -773,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -552,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                -246,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -473,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -393,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                2,750,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                818,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                585,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                574,714,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                4,647,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,062,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,487,744,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |