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 | 
                                                14,078,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,803,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,078,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,275,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,296,353,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,842,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,545,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,842,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                140,807,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,616,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,675,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,677,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                117,788,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                54,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,352,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                104,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                104,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |