Key Financial Data Of Group
| Concept | 2024-01-01 to 2024-06-30 | As at 2024-06-30 | 2023-01-01 to 2023-12-31 | As at 2023-12-31 | 2023-01-01 to 2023-06-30 | As at 2023-06-30 | 
|---|---|---|---|---|---|---|
| Key financial data of group | ||||||
| Business results of group | ||||||
| Net sales | 
                                                6,393,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                13,524,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                6,843,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | 
                                                257,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                1,313,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                803,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | 
                                                178,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                966,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                690,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | 
                                                246,118,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                712,030,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                583,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net assets | — | 
                                                14,651,302,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,601,321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                14,100,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Total assets | — | 
                                                23,420,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                25,227,266,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                23,820,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Basic earnings (loss) per share | 
                                                4.57
                                                
                                             | — | 
                                                25.07
                                                
                                             | — | 
                                                18.16
                                                
                                             | — | 
| Diluted earnings per share |  | — | 
                                                25.07
                                                
                                             | — | 
                                                18.15
                                                
                                             | — | 
| Equity-to-asset ratio | — | 
                                                0.609
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.565
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | — | 
                                                0.576
                                                
                                                    
                                                        xbrli:pure
                                                    
                                                
                                             | 
| Net cash provided by (used in) operating activities | 
                                                109,197,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                592,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                393,297,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) investing activities | 
                                                256,612,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -95,219,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -240,646,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net cash provided by (used in) financing activities | 
                                                -234,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,859,849,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                -2,829,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cash and cash equivalents | — | 
                                                9,985,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                10,194,072,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                9,823,577,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |