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 | 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 and profit (loss) for each reportable segment | ||||||||||||||||
| Sales | ||||||||||||||||
| Revenues from external customers | 
                                                17,746,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,984,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,984,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                238,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                419,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,318,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,371,630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,371,630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                431,451,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,927,170,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,483,539,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                444,460,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                240,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,165,343,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                925,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,165,343,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,164,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                165,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                814,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -814,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,269,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                721,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |