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 | — | 
                                                3,132,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,921,857,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                408,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                354,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -63,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -48,577,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -251,333,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -416,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                3,243,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,811,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -2,210,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,058,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                240,343,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -4,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -63,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                141,796,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from collection of loans receivable | — | 
                                                4,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                9,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -2,011,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,075,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from short-term borrowings | — | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of short-term borrowings | — | 
                                                -500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | — | 
                                                3,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -3,793,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,192,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                -1,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -436,576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -398,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -1,442,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -508,706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                77,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,123,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -210,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,771,889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                6,346,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,556,974,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,328,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |