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 | 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 | 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 | 
                                                61,056,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,056,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,262,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,056,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,779,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,933,827,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,459,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,918,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,007,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,471,441,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,459,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,459,747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||||||
| Depreciation | 
                                                422,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                422,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                306,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                422,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,353,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                364,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                248,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                115,907,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                364,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                364,567,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                291,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                291,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                176,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                291,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,229,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                102,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                163,735,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                268,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |