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 | ||||||
| Subtotal | 
                                                2,041,776,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                71,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest paid | 
                                                -8,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -8,272,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) operating activities | 
                                                1,733,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                213,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from investing activities | ||||||
| Purchase of property, plant and equipment | 
                                                -434,115,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -539,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other, net | 
                                                -4,711,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -3,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) investing activities | 
                                                -441,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -445,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash flows from financing activities | ||||||
| Proceeds from long-term borrowings | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repayments of long-term borrowings | 
                                                -170,664,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -139,889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividends paid | 
                                                -60,259,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -50,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net cash provided by (used in) financing activities | 
                                                -534,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                257,884,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Effect of exchange rate change on cash and cash equivalents | 
                                                845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net increase (decrease) in cash and cash equivalents | 
                                                758,506,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                26,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cash and cash equivalents | — | 
                                                2,507,528,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,749,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,522,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,495,635,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |