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 | — | — | 
                                                5,660,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                5,475,278,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating expenses | ||||||||
| Selling, general and administrative expenses | — | — | 
                                                740,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                737,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Depreciation | — | — | 
                                                11,772,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other | — | — | 
                                                98,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                87,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cost of sales | — | — | 
                                                4,365,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,160,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating expenses | ||||||||
| Operating expenses - general | ||||||||
| Remuneration for directors (and other officers) | — | — | 
                                                75,603,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                103,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Rent expenses on land and buildings | — | — | 
                                                36,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                35,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating expenses | ||||||||
| Operating expenses | ||||||||
| Other operating expenses | ||||||||
| Provision for retirement benefits for directors (and other officers) | — | — | 
                                                9,688,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                13,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Operating profit (loss) | — | — | 
                                                554,177,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                577,793,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Gross profit (loss) | — | — | 
                                                1,294,309,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                1,315,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Net sales | ||||||||
| Ordinary profit (loss) | — | — | 
                                                550,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                592,281,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| General and administrative expenses | ||||||||
| Salaries | — | — | — | — | — | — | — | — | 
| Operating expenses | ||||||||
| Non-operating income | — | — | 
                                                1,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                18,934,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Dividend income | — | — | 
                                                50,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Interest income | — | — | 
                                                34,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                31,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Selling, general and administrative expenses | ||||||||
| Legal welfare expenses | — | — | 
                                                52,562,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                51,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating income | ||||||||
| Other | — | — | 
                                                112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                6,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Cost of sales | ||||||||
| Extraordinary income | — | — | 
                                                98,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating expenses | ||||||||
| Interest expenses | — | — | 
                                                3,945,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,334,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Other | — | — | 
                                                257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Non-operating expenses | — | — | 
                                                4,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                4,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary losses | — | — | 
                                                56,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                2,922,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Profit (loss) before income taxes | — | — | 
                                                494,417,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                589,359,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Gross profit | ||||||||
| Extraordinary income | ||||||||
| Gain on sale of non-current assets | — | — | 
                                                98,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes - current | — | — | 
                                                187,981,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                194,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Extraordinary losses | ||||||||
| Loss on retirement of non-current assets | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes - deferred | — | — | 
                                                -82,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                -6,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Income taxes | — | — | 
                                                105,830,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
                                                187,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | — | — | 
| Profit (loss) | 
                                                388,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                388,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                388,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                388,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                401,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                401,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                401,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                401,538,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |