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 | 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 | 2023-01-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of income | ||||||||||||
| Statement of income | ||||||||||||
| Net sales | 
                                                -1,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                402,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,781,698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,782,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,302,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,833,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,834,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,658,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                423,195,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,319,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,030,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | — | — | 
                                                2,834,622,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                3,030,444,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Operating expenses | ||||||||||||
| Selling, general and administrative expenses | — | — | 
                                                616,881,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                556,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Operating expenses | ||||||||||||
| Ordinary profit (loss) | — | — | 
                                                1,446,639,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,307,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Net sales | ||||||||||||
| Operating profit (loss) | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                121,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,330,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,330,194,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,190,184,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,246,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,246,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,111,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Gross profit (loss) | — | — | 
                                                1,947,076,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,802,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Cost of sales | ||||||||||||
| Selling, general and administrative expenses | ||||||||||||
| Non-operating income | ||||||||||||
| Interest income | — | — | 
                                                26,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                9,286,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Dividend income | — | — | 
                                                75,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                69,957,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Non-operating income | — | — | 
                                                117,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                87,282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Miscellaneous income | — | — | 
                                                4,466,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                7,818,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Extraordinary income | — | — | 
                                                72,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Extraordinary losses | — | — | 
                                                21,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                18,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Non-operating expenses | ||||||||||||
| Non-operating expenses | — | — | 
                                                1,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                26,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Profit (loss) before income taxes | — | — | 
                                                1,497,989,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,291,315,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Gross profit | ||||||||||||
| Income taxes - current | — | — | 
                                                516,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                453,147,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Extraordinary income | ||||||||||||
| Gain on sale of investment securities | — | — | 
                                                68,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Extraordinary losses | ||||||||||||
| Loss on sale of investment securities | — | — | 
                                                20,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                18,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Loss on retirement of non-current assets | — | — | 
                                                153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Income taxes - deferred | — | — | 
                                                -56,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -55,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Income taxes | — | — | 
                                                460,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                397,360,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Profit (loss) | — | — | 
                                                1,037,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                893,955,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Profit (loss) attributable to non-controlling interests | — | — | 
                                                5,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                10,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Profit (loss) attributable to owners of parent | — | — | 
                                                1,037,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                893,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Other comprehensive income | ||||||||||||
| Valuation difference on available-for-sale securities | — | — | 
                                                2,614,711,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                5,933,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Remeasurements of defined benefit plans, net of tax | — | — | 
                                                16,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                -38,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Other comprehensive income | — | — | 
                                                2,614,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                5,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Profit attributable to | ||||||||||||
| Comprehensive income | — | — | 
                                                3,651,969,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                899,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Comprehensive income attributable to | ||||||||||||
| Comprehensive income attributable to owners of parent | — | — | 
                                                3,651,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                899,839,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Comprehensive income attributable to non-controlling interests | — | — | 
                                                5,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                10,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — |