Consolidated Statement Of Cash Flows
| Concept | 2022-09-01 to 2023-08-31 | As at 2023-08-31 | 2021-09-01 to 2022-08-31 | As at 2022-08-31 | As at 2021-08-31 | 
|---|---|---|---|---|---|
| Consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Subtotal | 
                                                411,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                855,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest and dividends received | 
                                                2,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -73,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -60,966,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -77,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -80,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                245,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                707,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | 
                                                -169,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -145,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -264,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -155,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | |||||
| Dividends paid | 
                                                -23,386,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -23,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from issuance of bonds | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from long-term borrowings | 
                                                500,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | 
                                                -640,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -715,975,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Redemption of bonds | 
                                                -10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -18,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -583,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                18,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -24,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -18,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -55,149,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                966,459,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                984,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,040,009,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |