Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                7,657,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,368,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                675,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                576,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                27,440,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                9,066,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,720,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Land | 
                                                6,937,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,129,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                2,128,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,591,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Other | 
                                                39,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                728,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                5,684,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,958,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                3,934,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,494,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,830,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,544,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -80,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -80,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                15,649,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,407,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                43,089,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,473,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Notes and accounts payable - trade | 
                                                4,123,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,464,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Short-term borrowings | 
                                                3,772,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                773,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                266,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                656,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,801,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                13,208,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,159,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                538,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                630,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                84,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                741,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                651,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,691,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,946,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                14,899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,105,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                1,155,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,089,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                579,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses for directors (and other officers) | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                10,836,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,836,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                5,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,890,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                10,770,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,427,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,381,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,304,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                26,116,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                25,849,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                1,193,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,578,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                -15,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -19,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                895,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                959,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                2,073,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,518,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                28,189,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,368,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                43,089,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,473,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |