Quarterly Consolidated Statement Of Cash Flows
| Concept | As at 2025-02-28 | 2024-03-01 to 2025-02-28 | 2023-03-01 to 2024-02-29 | As at 2024-02-29 | As at 2023-02-28 | 
|---|---|---|---|---|---|
| Quarterly consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | — | 
                                                2,132,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,876,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                5,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -64,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -60,079,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -658,568,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -152,773,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                1,418,762,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,798,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -707,575,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -415,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                -13,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -20,107,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -819,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -591,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Proceeds from long-term borrowings | — | 
                                                1,393,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,388,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -1,831,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,634,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from issuance of bonds | — | 
                                                586,806,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,768,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Redemption of bonds | — | 
                                                -851,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -332,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from issuance of shares | — | 
                                                4,710,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -320,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                3,563,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,072,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                4,162,892,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,279,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                10,660,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,497,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,217,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |