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 | 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 | 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 | 
                                                21,041,303,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,313,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,921,353,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                272,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,313,799,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,669,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,450,481,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,915,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,435,863,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                398,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,195,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,797,410,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,445,980,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,195,897,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                2,503,558,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,526,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,800,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,526,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,898,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,453,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,596,038,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,784,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,784,316,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,664,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,024,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||
| Depreciation | 
                                                61,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,224,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,838,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,716,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,409,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,341,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,472,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,136,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                70,234,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,551,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,470,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,767,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,662,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,152,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,853,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,701,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,853,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |