Notes - Property, Plant And Equipment
| Concept | As at 2025-03-31 | As at 2024-03-31 | 
|---|---|---|
| Notes - Property, plant and equipment | ||
| Components of property, plant and equipment | ||
| Acquisition cost | ||
| Land | 
                                                18,410,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,865,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures | 
                                                281,002,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                275,304,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                37,189,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,699,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                738,322,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                689,479,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | ||
| Land | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures | 
                                                -143,213,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -137,072,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                -409,401,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -395,737,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Carrying amount | ||
| Land | 
                                                18,410,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,865,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures | 
                                                137,789,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                138,232,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                37,189,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,699,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                328,921,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                293,742,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |