Semi-Annual Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                47,942,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,639,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,033,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                780,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                80,199,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                75,796,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                18,008,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,266,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                9,385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -2,654,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,463,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                750,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                767,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                427,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                354,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                2,396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                3,769,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,771,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term loans receivable | 
                                                1,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                268,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,109,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                22,204,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,392,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                102,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Accounts payable - trade | 
                                                6,943,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,047,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                1,117,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,530,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,708,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,152,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                18,422,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,800,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                1,099,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,683,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                397,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                19,521,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,484,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for bonuses | 
                                                3,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for bonuses for directors (and other officers) | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                4,993,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,993,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | ||
| Capital surplus | 
                                                6,273,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,273,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                74,194,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,614,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -5,105,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,105,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                80,356,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,775,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                348,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                232,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                -41,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                652,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                82,882,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,704,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                267,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                102,404,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |