Semi-Annual Consolidated Balance Sheet
| Concept | As at 2023-09-30 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                51,274,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                52,639,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,499,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                780,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                79,410,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                75,796,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                18,138,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,266,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings and structures | 
                                                13,953,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,882,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -5,975,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,781,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Buildings and structures, net | 
                                                7,978,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                9,385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,385,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,375,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,230,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -2,601,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,463,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                774,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                767,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                466,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                354,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                3,601,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,771,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                2,449,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,200,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term loans receivable | 
                                                2,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                46,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                452,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,111,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,118,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -7,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                22,205,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,392,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                101,616,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                1,488,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,530,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,899,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,152,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                17,864,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,800,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,600,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retirement benefit liability | 
                                                690,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                677,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                411,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                396,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                1,112,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,683,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                18,977,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,484,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                8,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses for directors (and other officers) | 
                                                31,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Share capital | 
                                                4,993,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,993,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | 
                                                6,273,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,273,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                73,350,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,614,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -5,105,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -5,105,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                79,511,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                77,775,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                382,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                232,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred gains or losses on hedges | 
                                                553,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -270,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Foreign currency translation adjustment | 
                                                371,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                245,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Remeasurements of defined benefit plans | 
                                                -18,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -24,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,288,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                223,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                135,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-controlling interests | 
                                                1,615,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,610,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                82,639,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,704,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                101,616,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,188,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |