Consolidated 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 | 
|---|---|---|---|---|---|
| Consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Profit (loss) before income taxes | 
                                                49,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                56,353,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | 
                                                19,458,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                19,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividend income | 
                                                -45,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest expenses | 
                                                373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                714,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | 
                                                27,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                116,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in trade receivables | 
                                                -12,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -12,217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -14,283,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in inventories | 
                                                90,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in trade payables | 
                                                -26,991,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                33,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                18,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                101,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -714,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -7,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -18,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -18,687,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -49,007,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of investment securities | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -20,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of investment securities | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                97,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Repayments of long-term borrowings | 
                                                -54,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -60,168,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -55,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -60,810,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of lease liabilities | 
                                                -642,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -642,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -55,215,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -8,333,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                200,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                255,763,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                264,096,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |