Quarterly Consolidated Statement Of Cash Flows
| Concept | 2023-10-01 to 2024-09-30 | As at 2024-09-30 | 2022-10-01 to 2023-09-30 | As at 2023-09-30 | As at 2022-09-30 | 
|---|---|---|---|---|---|
| Quarterly consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Profit (loss) before income taxes | 
                                                -754,961,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -852,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividend income | 
                                                -10,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -5,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in trade receivables | 
                                                7,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in inventories | 
                                                69,541,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -14,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                20,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                13,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | 
                                                -816,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -837,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | 
                                                10,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                5,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -1,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,490,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                -661,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -689,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Net cash provided by (used in) investing activities | 
                                                -121,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -120,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Purchase of treasury shares | 
                                                -31,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                838,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                69,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                55,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -740,806,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                1,816,943,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,761,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,502,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |