Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2024-04-01 to 2024-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 2023-04-01 to 2023-09-30 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                37,463,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,650,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                91,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                99,209,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                53,672,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                101,787,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,577,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                97,307,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                96,151,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,156,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,704,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,026,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                87,281,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                858,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,000,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                571,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,430,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                892,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,265,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,265,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                520,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,853,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,412,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                1,610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,511,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,625,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,901,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,630,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,108,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,767,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,762,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,552,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                107,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,660,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Equity in earnings (losses) of affiliates | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income tax expense | 
                                                1,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,928,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,499,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,327,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,539,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -39,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,940,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,076,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                990,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -85,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,281,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                417,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                659,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments in entities accounted for using equity method | 
                                                29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                539,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                417,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                535,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                413,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                92,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                3,989,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,732,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,791,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,742,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,791,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,437,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,824,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,828,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,314,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,751,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |