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 | 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 | 
                                                994,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,022,357,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,045,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,045,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,029,195,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,449,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,231,803,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,152,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,064,855,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,449,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -22,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,055,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -27,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,542,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                2,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                158,946,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                247,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                235,629,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,416,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,106,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                66,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                969,215,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,327,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,117,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                2,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                159,808,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                156,817,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,669,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,010,379,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                785,383,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                165,706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,048,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |