Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 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 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                7,833,025,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,266,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,560,410,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,266,770,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,873,334,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,834,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,344,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,683,027,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,344,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,827,877,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                545,691,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                546,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                318,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -546,010,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                850,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                850,878,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -850,916,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||
| Depreciation | 
                                                67,764,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                196,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,453,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,710,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,841,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                95,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,720,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                175,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,832,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                55,924,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                204,196,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                96,129,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                40,205,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                108,066,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,540,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,650,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                96,738,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                167,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |