Consolidated Statement Of Income
| Concept | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2023-04-01 to 2024-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|
| Consolidated statement of income | ||||||||
| Statement of income | ||||||||
| Net sales | — | — | 
                                                5,056,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,923,246,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating expenses | ||||||||
| Operating expenses - general | ||||||||
| Remuneration for directors (and other officers) | — | — | 
                                                120,878,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                144,815,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Welfare expenses | — | — | 
                                                22,258,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                15,959,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Rent expenses on land and buildings | — | — | 
                                                29,601,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                28,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Taxes and dues | — | — | 
                                                9,597,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                9,280,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | — | — | 
                                                71,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                62,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating expenses | ||||||||
| Selling, general and administrative expenses | — | — | 
                                                1,686,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,692,399,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other | — | — | 
                                                77,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                67,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating expenses | ||||||||
| Cost of sales | — | — | 
                                                2,504,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,409,754,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating profit (loss) | — | — | 
                                                865,212,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                821,091,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Ordinary profit (loss) | — | — | 
                                                928,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                853,968,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| General and administrative expenses | ||||||||
| Salaries | — | — | — | — | — | — | — | — | 
| Gross profit (loss) | — | — | 
                                                2,551,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,513,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating expenses | ||||||||
| Research and development expenses | — | — | 
                                                148,802,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                165,797,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net sales | ||||||||
| Extraordinary income | — | — | 
                                                3,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Selling, general and administrative expenses | ||||||||
| Advertising expenses | — | — | 
                                                23,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                11,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Legal welfare expenses | — | — | 
                                                113,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                114,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Entertainment expenses | — | — | 
                                                8,118,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Communication expenses | — | — | 
                                                16,812,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                17,484,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Supplies expenses | — | — | 
                                                41,663,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                49,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Insurance expenses | — | — | 
                                                6,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Repair expenses | — | — | 
                                                7,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                12,872,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating income | ||||||||
| Interest income | — | — | 
                                                24,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                22,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividend income | — | — | 
                                                6,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,467,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other | — | — | 
                                                1,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,785,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating income | — | — | 
                                                106,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                40,946,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cost of sales | ||||||||
| Non-operating expenses | ||||||||
| Interest expenses | — | — | 
                                                6,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                7,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating expenses | — | — | 
                                                43,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary losses | — | — | 
                                                2,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Profit (loss) before income taxes | — | — | 
                                                930,069,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                845,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Gross profit | ||||||||
| Income taxes - current | — | — | 
                                                299,704,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                293,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary income | ||||||||
| Gain on sale of non-current assets | — | — | 
                                                3,692,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary losses | ||||||||
| Loss on retirement of non-current assets | — | — | 
                                                2,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                8,801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes - deferred | — | — | 
                                                -7,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -16,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes | — | — | 
                                                292,104,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                276,991,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Profit (loss) | 
                                                637,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                637,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                637,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                637,965,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                568,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                568,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                568,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                568,174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |