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 | 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 | 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 | 
                                                6,896,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,402,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,506,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,821,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,419,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,821,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,614,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,348,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,475,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,266,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,090,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,090,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                752,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                949,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                197,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,002,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,002,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                932,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                706,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                226,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                968,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                968,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                847,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                913,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,023,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,032,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                747,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                722,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                834,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                933,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |