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 | 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 | 
                                                5,475,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,986,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,493,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,017,789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,267,257,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,870,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                902,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,039,908,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||
| Depreciation | 
                                                550,282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                577,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,781,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                607,855,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                626,734,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                753,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,010,807,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                247,865,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                474,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,154,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                498,129,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |