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 | 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 | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,156,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,237,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,658,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,658,393,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                466,590,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                797,798,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                36,664,694,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                433,204,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                769,654,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,841,841,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,974,287,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,841,841,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Transactions with other segments | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other items | ||||||||||||||
| Depreciation | 
                                                22,552,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,413,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                109,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                202,889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                180,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,260,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,264,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,814,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,729,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                154,499,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                46,917,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,313,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Increase in property, plant and equipment and intangible assets | 
                                                676,073,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                82,628,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                896,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                220,381,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,202,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,518,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,660,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                137,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                107,749,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                140,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |