Consolidated Statement Of Income
| Concept | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of income | ||||||||||
| Statement of income | ||||||||||
| Ordinary income | — | — | — | — | — | — | — | — | — | — | 
| Other operating income | — | — | — | — | — | — | — | — | — | — | 
| Share of profit of entities accounted for using equity method | — | — | — | 
                                                10,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Net sales | 
                                                3,177,361,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                453,258,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,970,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,601,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,601,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,842,961,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,006,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                391,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,006,883,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,772,129,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | — | — | — | 
                                                5,350,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                4,983,081,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||
| Selling, general and administrative expenses | — | — | — | 
                                                748,143,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                672,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||
| Operating expenses - general | ||||||||||
| Remuneration for directors (and other officers) | — | — | — | 
                                                96,775,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                87,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Operating expenses | ||||||||||
| General and administrative expenses | ||||||||||
| Salaries | — | — | — | — | — | — | — | — | — | — | 
| Operating profit (loss) | 
                                                636,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -29,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                594,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                502,762,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,201,682,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                541,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                977,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -31,577,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                351,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                467,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net sales | ||||||||||
| Gross profit (loss) | — | — | — | 
                                                1,250,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,023,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Ordinary profit (loss) | — | — | — | 
                                                548,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                354,791,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary income | — | — | — | 
                                                4,983,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                51,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Selling, general and administrative expenses | ||||||||||
| Non-operating income | — | — | — | 
                                                61,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                8,001,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Dividend income | — | — | — | 
                                                2,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                845,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Interest income | — | — | — | 
                                                56,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                49,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Cost of sales | ||||||||||
| Non-operating income | ||||||||||
| Other | — | — | — | 
                                                3,755,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating expenses | ||||||||||
| Interest expenses | — | — | — | 
                                                1,375,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,971,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other | — | — | — | 
                                                908,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                462,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Non-operating expenses | — | — | — | 
                                                16,117,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                4,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary losses | — | — | — | 
                                                2,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                90,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Gross profit | ||||||||||
| Profit (loss) before income taxes | — | — | — | 
                                                550,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                315,859,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary income | ||||||||||
| Gain on sale of non-current assets | — | — | — | 
                                                4,983,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes - current | — | — | — | 
                                                125,980,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                61,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Extraordinary losses | ||||||||||
| Loss on retirement of non-current assets | — | — | — | 
                                                2,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                39,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes - deferred | — | — | — | 
                                                49,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                43,952,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Income taxes | — | — | — | 
                                                175,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                105,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) | — | — | — | 
                                                375,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                210,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit (loss) attributable to owners of parent | — | — | — | 
                                                375,373,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                210,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Profit attributable to | ||||||||||
| Other comprehensive income | ||||||||||
| Valuation difference on available-for-sale securities | — | — | — | 
                                                -10,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                9,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Foreign currency translation adjustment | — | — | — | 
                                                4,917,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                3,439,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Remeasurements of defined benefit plans, net of tax | — | — | — | 
                                                -11,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                168,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Other comprehensive income | — | — | — | 
                                                -16,922,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                13,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income | — | — | — | 
                                                358,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                223,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
| Comprehensive income attributable to | ||||||||||
| Comprehensive income attributable to owners of parent | — | — | — | 
                                                358,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                223,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — |