Notes - Segment Information, Etc.
| Concept | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2021-04-01 to 2022-03-31 | 2020-04-01 to 2021-03-31 | 2020-04-01 to 2021-03-31 | 2020-04-01 to 2021-03-31 | 2020-04-01 to 2021-03-31 | 2020-04-01 to 2021-03-31 | 2020-04-01 to 2021-03-31 | 2020-04-01 to 2021-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                47,003,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,494,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,910,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,003,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,172,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,427,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,003,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,870,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -772,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,697,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,231,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,370,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                1,407,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,346,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,407,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                908,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -44,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -908,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -45,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                969,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                1,528,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                131,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                56,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                539,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,068,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                674,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                665,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,481,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                652,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                519,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                620,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,001,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                149,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                2,833,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                55,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                108,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,942,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,440,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,245,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,888,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                776,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                604,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                873,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,493,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                125,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                113,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |