Quarterly 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 | 
|---|---|---|---|---|---|
| Quarterly statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                169,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                121,898,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -3,393,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -549,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                165,743,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                121,348,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -3,521,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,402,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                11,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -101,478,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -145,754,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | — | 
                                                -1,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -3,855,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,154,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -4,568,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,860,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                59,696,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -27,274,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                847,746,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                788,049,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                815,323,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |