Semi-Annual Consolidated 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 consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                3,194,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,228,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                138,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -165,156,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -139,961,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                3,359,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,927,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Proceeds from sale of securities | — | 
                                                6,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of property, plant and equipment | — | 
                                                -3,880,695,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,232,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                227,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -4,546,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -103,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                61,114,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -9,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -42,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -3,755,532,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,552,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from long-term borrowings | — | 
                                                2,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,900,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -2,397,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,603,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                -314,763,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -74,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -621,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -619,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                442,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,705,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                45,068,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                544,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                91,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                624,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                9,231,881,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                9,140,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,515,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |