Notes - Property, Plant And Equipment
| Concept | As at 2024-03-31 | As at 2023-03-31 | 
|---|---|---|
| Notes - Property, plant and equipment | ||
| Components of property, plant and equipment | ||
| Acquisition cost | ||
| Land | 
                                                7,673,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,595,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures | 
                                                29,885,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,412,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                5,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,997,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                67,678,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,929,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | ||
| Land | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures | 
                                                -19,083,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,540,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                -34,096,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -33,714,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Carrying amount | ||
| Land | 
                                                7,673,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,595,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures | 
                                                10,801,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,871,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                5,136,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,997,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                33,582,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                32,215,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |