Notes - Segment Information, Etc.
| Concept | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2023-04-01 to 2023-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 2022-04-01 to 2022-12-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                6,411,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,453,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,453,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                215,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                339,492,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                126,135,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,946,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                673,082,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,847,199,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,847,199,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,643,909,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                203,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                198,307,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                93,983,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                107,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,080,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                716,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                446,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                279,571,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                402,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,559,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -402,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                199,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                372,870,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                238,836,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                134,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -372,870,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                161,615,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,215,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |