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 | 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 | 
                                                48,623,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,623,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,714,455,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,909,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,042,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,722,777,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,765,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,765,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                261,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -261,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                261,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,403,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -31,610,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                921,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                916,699,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,426,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                255,795,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                665,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                252,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                651,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                904,306,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                899,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                1,157,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,157,673,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                263,317,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                894,356,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                341,641,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                513,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                855,106,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,326,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                846,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |