Consolidated Statement Of Income
| Concept | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2024-01-01 to 2024-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 2023-01-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of income | ||||||||||
| Statement of income | ||||||||||
| Net sales | 
                                                -631,773,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,948,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,303,284,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,276,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,579,808,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,366,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,038,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,722,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,315,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -671,641,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | — | 
                                                5,547,474,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                5,651,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Operating expenses | ||||||||||
| Selling, general and administrative expenses | — | 
                                                1,572,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,384,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Operating expenses | ||||||||||
| Net sales | ||||||||||
| Gross profit (loss) | — | 
                                                2,400,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,715,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Operating profit (loss) | 
                                                -801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                827,922,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                351,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                477,590,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                828,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,331,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,332,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                380,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                951,461,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | — | 
                                                972,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,391,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Non-operating income | ||||||||||
| Interest income | — | 
                                                45,639,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                26,382,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Other | — | 
                                                6,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                9,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Non-operating income | — | 
                                                147,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                63,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Extraordinary income | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                7,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Selling, general and administrative expenses | ||||||||||
| Cost of sales | ||||||||||
| Non-operating expenses | — | 
                                                3,253,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                3,657,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Interest expenses | — | 
                                                1,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Non-operating expenses | ||||||||||
| Other | — | 
                                                305,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                722,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) before income taxes | — | 
                                                972,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,398,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Gross profit | ||||||||||
| Extraordinary income | ||||||||||
| Gain on sale of investment securities | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                7,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Income taxes - current | — | 
                                                294,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                379,009,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Income taxes - deferred | — | 
                                                -16,950,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                38,162,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Income taxes | — | 
                                                277,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                417,171,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) | — | 
                                                695,230,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                980,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) attributable to non-controlling interests | — | 
                                                23,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                26,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Profit (loss) attributable to owners of parent | — | 
                                                671,930,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                954,214,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Profit attributable to | ||||||||||
| Other comprehensive income | ||||||||||
| Valuation difference on available-for-sale securities | — | 
                                                745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -20,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Foreign currency translation adjustment | — | 
                                                423,771,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -7,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Remeasurements of defined benefit plans, net of tax | — | 
                                                1,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                35,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Other comprehensive income | — | 
                                                425,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -7,285,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Comprehensive income | — | 
                                                1,120,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                973,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Comprehensive income attributable to | ||||||||||
| Comprehensive income attributable to owners of parent | — | 
                                                1,083,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                953,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
| Comprehensive income attributable to non-controlling interests | — | 
                                                37,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                20,550,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — |