Notes - Segment Information, Etc.
| Concept | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 2024-04-01 to 2025-03-31 | 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 | 2023-04-01 to 2024-03-31 | 
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 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 | 
                                                2,741,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,341,856,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,502,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,386,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,407,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,502,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,502,203,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,056,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,262,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,056,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                61,056,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                80,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,779,478,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,933,827,000
                                                
                                                    
                                                        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 | 
                                                1,271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                426,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                285,589,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                426,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                426,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                422,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                306,634,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                422,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                422,037,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,353,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                34,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                375,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,068,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                658,645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,068,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,068,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                291,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                176,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                291,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                291,521,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                114,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |