Statement Of Cash Flows
| Concept | As at 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | As at 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-11-01 to 2023-09-30 | As at 2022-09-30 | 
|---|---|---|---|---|---|---|---|
| Statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | — | 
                                                580,424,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                503,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                361,522,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                15,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,562,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                -6,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -6,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                19,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                93,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -336,346,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in inventories | — | — | 
                                                30,368,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -27,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in trade payables | — | — | 
                                                -27,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                150,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | — | — | 
                                                786,012,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                284,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | — | — | 
                                                -146,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -89,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | — | — | 
                                                130,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                65,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                639,424,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                195,199,000
                                                
                                                    
                                                        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 | — | — | 
                                                -22,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -69,182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                2,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||||
| Net cash provided by (used in) investing activities | — | — | 
                                                -36,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -65,937,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||||
| Proceeds from issuance of shares | — | — | 
                                                374,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                374,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                977,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                129,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | 
                                                2,226,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,249,064,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,119,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |