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 | — | 
                                                10,492,351,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,721,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                48,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -207,295,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -233,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -1,327,539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,338,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                9,005,984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,230,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -2,848,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,508,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                17,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Loan advances | — | 
                                                -48,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -29,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -618,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -201,679,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -3,657,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,221,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Repayments of long-term borrowings | — | 
                                                -40,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -40,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                -2,523,940,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -699,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -973,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,795,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -5,493,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,432,313,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -13,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                -133,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                760,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -277,851,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,662,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                12,794,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                13,072,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,734,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |