Statement Of Cash Flows
| Concept | 2024-10-01 to 2025-03-31 | As at 2025-03-31 | As at 2024-09-30 | 2023-10-01 to 2024-03-31 | As at 2024-03-31 | As at 2023-09-30 | 
|---|---|---|---|---|---|---|
| Statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | 
                                                105,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                138,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | 
                                                8,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in allowance for doubtful accounts | 
                                                135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                43,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividend income | 
                                                -253,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest expenses | 
                                                2,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in trade receivables | 
                                                -167,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -147,499,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in inventories | 
                                                1,028,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | 
                                                20,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                52,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in trade payables | 
                                                36,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                12,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -3,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -52,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                59,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | 
                                                253,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -2,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from operating activities | ||||||
| Cash flows from operating activities | ||||||
| Loss (gain) on sale of investment securities | 
                                                -1,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from facilities maintenance and investing activities | ||||||
| Purchase of property, plant and equipment | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -558,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | ||||||
| Net cash provided by (used in) investing activities | 
                                                -2,197,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -558,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | ||||||
| Repayments of short-term borrowings | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -25,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | 
                                                -61,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -35,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -11,780,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                139,490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                -453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                45,271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                137,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                759,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                714,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                606,144,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                468,310,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |