Semi-Annual Consolidated 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 | 
|---|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | |||||||
| Statement of cash flows | |||||||
| Cash flows from operating activities | |||||||
| Profit (loss) before income taxes | — | 
                                                344,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                535,506,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                516,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                832,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | — | 
                                                119,230,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                124,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Amortization of goodwill | — | — | 
                                                2,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                47,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in allowance for doubtful accounts | — | — | 
                                                -910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividend income | — | — | 
                                                -1,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | — | 
                                                8,268,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in retirement benefit liability | — | — | 
                                                264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,331,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in provision for bonuses | — | — | 
                                                2,369,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,512,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | — | 
                                                -13,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -15,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | — | 
                                                -45,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -173,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | — | 
                                                19,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -130,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | — | 
                                                -17,975,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                15,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | — | 
                                                594,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                656,520,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | — | 
                                                1,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | — | 
                                                -8,730,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -7,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | — | 
                                                -310,462,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -216,995,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | — | 
                                                280,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                445,581,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||||
| Purchase of property, plant and equipment | — | — | 
                                                -15,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -22,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of property, plant and equipment | — | — | 
                                                1,001,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Loan advances | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | — | 
                                                -1,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -9,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | — | 
                                                7,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -242,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||||
| Repayments of long-term borrowings | — | — | 
                                                -267,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -146,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | — | 
                                                -86,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -42,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | — | 
                                                -387,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -78,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | — | 
                                                94,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | — | 
                                                -996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | — | 
                                                -100,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                125,903,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                1,686,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,787,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,661,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |