Consolidated Statement Of Income
| Concept | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Consolidated statement of income | ||||||||||||||||||
| Statement of income | ||||||||||||||||||
| Net sales | 
                                                4,386,896,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,609,812,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                3,689,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                4,516,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | 
                                                2,437,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,143,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                2,144,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,454,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||||||||||||||||||
| Operating expenses - general | ||||||||||||||||||
| Depreciation | — | 
                                                61,811,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                57,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Operating expenses | ||||||||||||||||||
| Selling, general and administrative expenses | 
                                                1,732,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,464,960,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                1,463,780,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,729,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||||||||||||||||||
| Other operating expenses | ||||||||||||||||||
| Provision for retirement benefits for directors (and other officers) | 
                                                4,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                5,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                5,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||||||||||||||||||
| Ordinary expenses | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Other operating expenses | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Share of loss of entities accounted for using equity method | 
                                                660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                2,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary expenses | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Interest expenses | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
| Interest expenses on bonds | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                87,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Gross profit (loss) | 
                                                1,949,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,466,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                1,544,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                2,062,282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| General and administrative expenses | ||||||||||||||||||
| Operating expenses | ||||||||||||||||||
| Research and development expenses | 
                                                191,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                191,098,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                184,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                184,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating profit (loss) | 
                                                216,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,564,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                81,178,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                333,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net sales | ||||||||||||||||||
| Ordinary profit (loss) | 
                                                207,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,592,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                157,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                298,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Extraordinary income | 
                                                84,153,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,192,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                59,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating income | 
                                                18,231,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                144,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                83,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                21,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Dividend income | 
                                                946,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                54,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                812,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Interest income | 
                                                506,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                222,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                11,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating income | ||||||||||||||||||
| Interest on securities | — | 
                                                20,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
| Other | 
                                                3,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                14,354,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                7,188,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | ||||||||||||||||||
| Selling, general and administrative expenses | ||||||||||||||||||
| Salaries | 
                                                540,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                410,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                412,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                554,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating expenses | ||||||||||||||||||
| Interest expenses | 
                                                1,118,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,004,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                1,612,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                448,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating expenses | 
                                                27,412,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,556,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                6,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                55,654,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Extraordinary losses | 
                                                34,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,999,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                128,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                128,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Impairment losses | 
                                                6,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,365,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                25,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                25,249,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) before income taxes | 
                                                256,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,784,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                29,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                170,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Gross profit | ||||||||||||||||||
| Extraordinary income | ||||||||||||||||||
| Gain on sale of non-current assets | 
                                                974,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                59,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes - current | 
                                                38,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                37,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                71,261,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Extraordinary losses | ||||||||||||||||||
| Loss on sale of non-current assets | 
                                                11,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,123,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes - deferred | 
                                                36,221,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                -68,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                -57,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes | 
                                                74,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | 
                                                -30,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                13,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) | 
                                                182,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                59,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                156,817,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to non-controlling interests | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) attributable to owners of parent | 
                                                182,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | 
                                                156,817,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                156,817,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | 
                                                156,817,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | ||||||||||||||||||
| Valuation difference on available-for-sale securities | 
                                                3,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                7,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                -21,592,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                21,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share of other comprehensive income of entities accounted for using equity method | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other comprehensive income | 
                                                -17,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                29,676,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit attributable to | ||||||||||||||||||
| Comprehensive income | 
                                                164,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                186,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income attributable to | ||||||||||||||||||
| Comprehensive income attributable to owners of parent | 
                                                164,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                186,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Comprehensive income attributable to non-controlling interests | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |