Consolidated Statement Of Cash Flows
| Concept | As at 2024-02-29 | 2023-09-01 to 2024-02-29 | As at 2023-08-31 | As at 2023-02-28 | 2022-09-01 to 2023-02-28 | As at 2022-08-31 | 
|---|---|---|---|---|---|---|
| Consolidated statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | — | 
                                                -161,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                68,651,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                5,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,533,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Impairment losses | — | 
                                                92,888,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Amortization of goodwill | — | 
                                                7,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                15,466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                7,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -2,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | 
                                                1,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in provision for bonuses | — | 
                                                -2,941,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,594,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | 
                                                -58,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                168,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | 
                                                -23,961,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -21,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | 
                                                112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -6,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -54,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | 
                                                3,814,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -33,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                118,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                13,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                23,837,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                3,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,319,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -1,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -796,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | ||||||
| Payments into time deposits | — | 
                                                -197,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -149,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from withdrawal of time deposits | — | 
                                                176,900,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                115,420,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of property, plant and equipment | — | 
                                                -1,698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -21,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -29,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                45,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -29,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                805,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | ||||||
| Proceeds from issuance of shares | — | 
                                                180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -18,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -6,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -18,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -7,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -530,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -81,550,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                156,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                2,463,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,544,752,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,678,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,521,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |