Semi-Annual Consolidated Statement Of Cash Flows
| Concept | As at 2024-03-31 | 2023-04-01 to 2024-03-31 | As at 2023-03-31 | 2022-04-01 to 2023-03-31 | As at 2022-03-31 | 
|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | |||||
| Statement of cash flows | |||||
| Cash flows from operating activities | |||||
| Profit (loss) before income taxes | — | 
                                                930,069,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                845,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Depreciation | — | 
                                                118,722,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                141,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividend income | — | 
                                                -6,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -6,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest expenses | — | 
                                                6,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Foreign exchange losses (gains) | — | 
                                                -12,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -15,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in provision for bonuses | — | 
                                                3,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in trade receivables | — | 
                                                -154,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -78,382,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Decrease (increase) in inventories | — | 
                                                -135,801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -103,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Increase (decrease) in trade payables | — | 
                                                80,437,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -87,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -59,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                27,921,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Subtotal | — | 
                                                731,911,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                850,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest and dividends received | — | 
                                                6,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest paid | — | 
                                                -6,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,549,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes paid | — | 
                                                -301,391,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -304,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) operating activities | — | 
                                                430,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                544,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from investing activities | |||||
| Purchase of property, plant and equipment | — | 
                                                -73,707,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -7,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Proceeds from sale of property, plant and equipment | — | 
                                                5,126,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other, net | — | 
                                                -2,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -5,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | — | 
                                                -72,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -10,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash flows from financing activities | |||||
| Proceeds from long-term borrowings | — | 
                                                150,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Repayments of long-term borrowings | — | 
                                                -200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Purchase of treasury shares | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -50,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividends paid | — | 
                                                -111,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -111,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | — | 
                                                -203,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -191,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Effect of exchange rate change on cash and cash equivalents | — | 
                                                12,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                15,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net increase (decrease) in cash and cash equivalents | — | 
                                                154,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                343,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | 
                                                2,833,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,679,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                2,336,787,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |