Quarterly Consolidated Statement Of Cash Flows
| Concept | As at 2024-08-31 | 2024-03-01 to 2024-08-31 | As at 2024-02-29 | 2023-03-01 to 2023-08-31 | As at 2023-08-31 | As at 2023-02-28 | 
|---|---|---|---|---|---|---|
| Quarterly consolidated statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | — | 
                                                508,377,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                428,177,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | — | 
                                                105,277,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                94,860,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                -4,774,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividend income | — | 
                                                -3,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest expenses | — | 
                                                5,892,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,711,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in trade receivables | — | 
                                                -1,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in inventories | — | 
                                                21,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -64,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in trade payables | — | 
                                                -17,066,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | 
                                                59,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                8,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | — | 
                                                645,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                464,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | — | 
                                                3,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | — | 
                                                -5,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -3,760,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | 
                                                -100,864,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -110,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                491,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                483,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | — | 
                                                -131,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -178,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | — | 
                                                -1,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -48,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Loan advances | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from collection of loans receivable | — | 
                                                4,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -140,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -252,913,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | ||||||
| Proceeds from long-term borrowings | — | 
                                                670,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | — | 
                                                -160,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -163,514,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -191,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | — | 
                                                -117,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -101,502,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                360,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -22,382,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                32,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                20,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                744,785,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                228,889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                1,756,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,011,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,091,230,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                862,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |