Semi-Annual Consolidated Statement Of Cash Flows
| Concept | 2024-01-01 to 2024-06-30 | As at 2024-06-30 | As at 2023-12-31 | 2023-01-01 to 2023-06-30 | As at 2023-06-30 | As at 2022-12-31 | 
|---|---|---|---|---|---|---|
| Semi-annual consolidated statement of cash flows | ||||||
| Statement of cash flows | ||||||
| Cash flows from operating activities | ||||||
| Profit (loss) before income taxes | 
                                                1,506,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,097,861,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | 
                                                731,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                714,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in allowance for doubtful accounts | 
                                                -4,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -921,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest expenses | 
                                                37,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                39,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in retirement benefit liability | 
                                                15,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                14,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Foreign exchange losses (gains) | 
                                                -28,611,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -103,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in provision for bonuses | 
                                                105,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Loss (gain) on sale of property, plant and equipment | 
                                                -339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Decrease (increase) in trade receivables | 
                                                -203,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                960,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Increase (decrease) in trade payables | 
                                                -47,053,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -312,785,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                105,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -9,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Subtotal | 
                                                2,049,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                3,527,065,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -36,957,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -43,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes paid | 
                                                -307,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,084,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                1,759,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,481,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | 
                                                -565,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,149,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Proceeds from sale of property, plant and equipment | 
                                                6,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                1,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -1,453,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -1,751,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | ||||||
| Proceeds from long-term borrowings | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                450,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | 
                                                -216,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -399,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Purchase of treasury shares | 
                                                -88,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | 
                                                -346,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -242,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -920,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -614,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                206,801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                240,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                -407,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                356,815,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                7,199,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,606,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                7,530,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,173,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |