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 | 
                                                17,628,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,628,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,313,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,314,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,422,409,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,414,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,414,519,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,992,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                117,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -117,457,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                102,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,085,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -74,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                70,130,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||
| Depreciation | 
                                                305,107,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                315,512,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,404,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                265,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,104,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                223,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                236,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                187,197,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                385,756,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                420,180,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,423,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                344,686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,070,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,658,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,039,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,045,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,007,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |