Quarter Period Consolidated Statement Of Income
| Concept | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Quarter period consolidated statement of income | ||||||||||
| Statement of income | ||||||||||
| Net sales | 
                                                635,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,491,328,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,291,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,291,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,163,951,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,938,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                681,998,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,938,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,182,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,074,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | — | — | — | 
                                                7,620,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                7,001,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Gross profit (loss) | — | — | — | 
                                                1,670,321,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                936,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Selling, general and administrative expenses | ||||||||||
| Selling, general and administrative expenses | — | — | — | 
                                                1,002,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                755,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating profit (loss) | 
                                                -41,421,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                865,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,602,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                668,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                778,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                889,266,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -38,973,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                181,422,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                165,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                762,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating income | ||||||||||
| Interest income | — | — | — | 
                                                50,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                57,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividend income | — | — | — | 
                                                2,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Share of profit of entities accounted for using equity method | — | — | — | 
                                                7,873,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating income | — | — | — | 
                                                16,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                12,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating expenses | ||||||||||
| Interest expenses | — | — | — | 
                                                2,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                3,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating expenses | — | — | — | 
                                                10,149,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                22,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Ordinary profit (loss) | — | — | — | 
                                                674,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                171,417,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary income | ||||||||||
| Gain on sale of non-current assets | — | — | — | 
                                                124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary income | — | — | — | 
                                                57,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary losses | ||||||||||
| Loss on sale of non-current assets | — | — | — | 
                                                19,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                9,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary losses | — | — | — | 
                                                99,686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                49,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Profit (loss) before income taxes | — | — | — | 
                                                632,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                122,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes - current | — | — | — | 
                                                106,516,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                13,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes - deferred | — | — | — | 
                                                94,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                49,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes | — | — | — | 
                                                200,562,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                63,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Profit (loss) | — | — | — | 
                                                431,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                58,654,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Profit attributable to | ||||||||||
| Profit (loss) attributable to owners of parent | — | — | — | 
                                                431,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                58,654,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other comprehensive income | ||||||||||
| Valuation difference on available-for-sale securities | — | — | — | 
                                                6,097,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                11,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Foreign currency translation adjustment | — | — | — | 
                                                4,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                2,515,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Remeasurements of defined benefit plans, net of tax | — | — | — | 
                                                252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                1,905,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other comprehensive income | — | — | — | 
                                                10,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                15,497,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income | — | — | — | 
                                                442,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                74,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Comprehensive income attributable to | ||||||||||
| Comprehensive income attributable to owners of parent | — | — | — | 
                                                442,179,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | 
                                                74,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — |