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 | 
                                                7,734,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,733,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,908,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,440,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,014,293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,392,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,528,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,848,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||
| Depreciation | 
                                                35,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                6,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                132,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                442,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                360,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |