Statement Of Cash Flows
| Concept | 2023-03-01 to 2024-02-29 | As at 2024-02-29 | 2022-03-01 to 2023-02-28 | As at 2023-02-28 | As at 2022-02-28 | 
|---|---|---|---|---|---|
| Statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | 
                                                332,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                322,952,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | 
                                                3,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -49,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -127,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -5,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -4,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                281,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                193,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from operating activities | |||||
| Cash flows from operating activities | |||||
| Cash flows from facilities maintenance and investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -98,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -206,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | 
                                                -3,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -33,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Net cash provided by (used in) investing activities | 
                                                -97,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -225,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | 
                                                -810,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | 
                                                -75,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -75,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | 
                                                1,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | 
                                                -657,669,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -644,891,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Redemption of bonds | 
                                                -50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                304,810,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -230,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                2,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                488,398,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -262,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                960,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                472,086,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                662,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |