Quarterly Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Quarterly balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | ||
| Property, plant and equipment | 
                                                216,723,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                200,077,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | 
                                                21,034,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,864,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Investments and other assets | ||
| Deferred tax assets | 
                                                43,079,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,246,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                32,772,195,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,924,282,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Reserves under special laws | ||
| Reserves under special laws | 
                                                24,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                31,807,171,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,022,531,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                124,799,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                124,799,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                143,631,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                141,281,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                633,094,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                591,638,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -5,607,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,068,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                895,916,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                849,650,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                2,713,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -4,812,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                17,640,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,412,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Revaluation reserve for land | 
                                                51,297,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,382,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                67,769,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,763,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                965,024,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                901,750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                32,772,195,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                29,924,282,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |