Notes - Segment Information, Etc.
| Concept | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2023-10-01 to 2024-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 2022-10-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                89,782,840,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                89,782,840,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,684,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,098,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,085,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,540,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,545,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,085,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,118,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,878,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,792,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                213,094,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                120,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                103,189,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,417,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,243,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                108,715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                241,237,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,994,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                206,385,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                97,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                101,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                125,323,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,078,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                101,244,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                212,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                86,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |