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 | 
|---|---|---|---|---|---|
| Consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                25,671,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,711,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                2,314,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,726,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -343,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -259,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -7,048,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,904,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                20,424,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,966,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -13,641,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,936,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                530,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                239,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                2,719,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,394,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -33,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -533,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of shares of subsidiaries resulting in change in scope of consolidation | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -526,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -61,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | — | 
                                                -29,082,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -30,654,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -5,141,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,891,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | — | 
                                                10,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of shares of subsidiaries not resulting in change in scope of consolidation | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -33,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -24,993,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -13,489,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                -653,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -2,502,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,982,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                59,995,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                62,498,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,516,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |