Notes - Segment Information, Etc.
| 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 | 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 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 2022-04-01 to 2023-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Notes - Segment information, etc. | ||||||||||||||
| Segment information | ||||||||||||||
| Disclosure of sales, profit (loss), asset, liability, and other items for each reportable segment | ||||||||||||||
| Sales | ||||||||||||||
| Revenues from external customers | 
                                                892,431,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,469,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,379,637,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,527,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                356,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,854,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,650,208,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                707,417,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,228,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                356,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,695,604,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,808,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                210,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,383,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                40,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,511,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,582,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                9,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,402,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,606,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,986,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                131,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Equity in earnings (losses) of affiliates | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments in entities accounted for using equity method | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,351,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,351,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                27,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,057,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,803,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,198,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,865,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,235,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |