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 | 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 | 
                                                9,620,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,401,397,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,319,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,340,818,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,734,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,733,488,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,440,137,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,908,405,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||
| Depreciation | 
                                                37,052,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                984,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                89,471,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                127,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                83,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                119,255,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                267,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                810,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                310,445,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                132,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |