Quarterly 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 | 2022-10-01 to 2023-09-30 | As at 2022-09-30 | 
|---|---|---|---|---|---|---|---|
| Quarterly statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | — | 
                                                173,784,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                256,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                29,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                170,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                186,222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                180,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Impairment losses | — | — | 
                                                6,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                25,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | — | 
                                                1,118,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,612,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                -43,911,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                150,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | — | 
                                                36,475,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -82,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | — | 
                                                67,530,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -162,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | — | 
                                                67,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -35,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | — | 
                                                362,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                378,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | — | 
                                                1,452,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | — | 
                                                -1,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                374,083,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                348,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -130,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -89,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                42,042,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                42,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of investment securities | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | — | 
                                                6,930,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                -94,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -103,602,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||||
| Repayments of short-term borrowings | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -27,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from long-term borrowings | — | — | 
                                                200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | — | 
                                                -179,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -211,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Redemption of bonds | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | — | 
                                                -46,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -46,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -30,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -286,780,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                -16,838,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                23,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                232,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -18,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                2,052,891,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,820,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,838,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |