Consolidated Statement Of Income
| Concept | 2023-04-01 to 2023-12-31 | 2022-04-01 to 2022-12-31 | 
|---|---|---|
| Consolidated statement of income | ||
| Statement of income | ||
| Net sales | 
                                                3,366,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,051,213,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Cost of sales | 
                                                1,976,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,825,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||
| Selling, general and administrative expenses | 
                                                496,838,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                365,254,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating expenses | ||
| Gross profit (loss) | 
                                                1,389,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,226,008,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Ordinary profit (loss) | 
                                                893,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                862,855,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Operating profit (loss) | 
                                                893,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                860,754,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net sales | ||
| Cost of sales | ||
| Non-operating income | ||
| Interest income | 
                                                11,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating income | 
                                                156,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Extraordinary income | 
                                                2,489,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Selling, general and administrative expenses | ||
| Non-operating expenses | ||
| Interest expenses | 
                                                103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-operating expenses | 
                                                103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Extraordinary losses | 
                                                2,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Gross profit | ||
| Profit (loss) before income taxes | 
                                                892,899,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                862,855,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes - current | 
                                                312,403,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                303,219,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Extraordinary income | ||
| Extraordinary losses | ||
| Loss on retirement of non-current assets | 
                                                2,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes - deferred | 
                                                6,345,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes | 
                                                318,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                317,069,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Profit (loss) | 
                                                574,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                545,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |