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 | 
                                                5,871,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                131,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,871,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,065,984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,673,878,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,359,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                391,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,974,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,993,821,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,359,665,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                83,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,020,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,018,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,252,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                105,558,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                44,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,139,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                62,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                244,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                129,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                244,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |