Quarterly Consolidated Statement Of Cash Flows
| Concept | As at 2024-08-31 | 2023-09-01 to 2024-08-31 | 2023-09-01 to 2024-08-31 | 2022-09-01 to 2023-08-31 | 2022-09-01 to 2023-08-31 | As at 2023-08-31 | As at 2022-08-31 | 
|---|---|---|---|---|---|---|---|
| Quarterly consolidated statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | — | 
                                                1,369,985,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                379,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,944,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                240,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | — | 
                                                545,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                444,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Impairment losses | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Amortization of goodwill | — | 
                                                79,754,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                49,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in allowance for doubtful accounts | — | 
                                                14,774,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividend income | — | 
                                                -2,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -3,105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest expenses | — | 
                                                40,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Loss (gain) on sale of property, plant and equipment | — | 
                                                -3,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -206,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Decrease (increase) in inventories | — | 
                                                -556,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -189,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Increase (decrease) in trade payables | — | 
                                                -178,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -117,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | 
                                                -29,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Subtotal | — | 
                                                261,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                983,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest and dividends received | — | 
                                                2,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                3,105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Interest paid | — | 
                                                -40,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -29,806,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Income taxes paid | — | 
                                                -425,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -366,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) operating activities | — | 
                                                -186,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                668,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | 
                                                -575,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -377,133,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                32,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                430,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of investment securities | — | 
                                                -160,668,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Proceeds from sale of investment securities | — | 
                                                58,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                17,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of shares of subsidiaries resulting in change in scope of consolidation | — | 
                                                -143,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,318,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Other, net | — | 
                                                72,824,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -455,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -1,503,483,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash flows from financing activities | |||||||
| Proceeds from long-term borrowings | — | 
                                                530,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,800,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Repayments of long-term borrowings | — | 
                                                -1,137,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -983,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Purchase of treasury shares | — | 
                                                -39,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Dividends paid | — | 
                                                -196,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -97,682,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -202,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,151,568,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                -844,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,316,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
| Cash and cash equivalents | 
                                                5,524,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                6,369,076,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,052,891,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |