Semi-Annual Balance Sheet
| Concept | As at 2023-09-30 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                8,276,396,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,598,633,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,330,123,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                851,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                36,805,547,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,881,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                58,798,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,384,843,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Tools, furniture and fixtures | — | — | 
| Tools, furniture and fixtures, net | 
                                                142,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                122,486,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                10,805,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,805,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                237,981,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,113,525,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                424,358,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                449,111,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                389,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                413,782,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                35,239,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,329,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                10,811,690,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,256,745,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                12,145,172,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,688,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                550,275,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                652,032,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                614,146,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                590,759,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -10,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -10,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                71,368,011,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,521,975,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                108,173,558,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,403,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                8,351,875,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,066,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                700,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                733,029,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                318,320,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                15,362,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,865,698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Unearned revenue | 
                                                1,747,612,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,022,220,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                252,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,230,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Bonds payable | 
                                                6,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                32,543,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                33,168,620,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                15,501,969,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,134,790,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                4,281,762,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,281,762,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                47,906,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,034,318,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for retirement benefits for directors (and other officers) | 
                                                4,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                141,723,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                152,002,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                46,201,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for bonuses for directors (and other officers) | 
                                                14,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,400,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                6,826,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,826,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | ||
| Capital surplus | 
                                                6,982,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,982,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                41,598,319,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,660,392,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,546,939,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,630,050,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                53,860,370,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,839,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                2,293,640,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,063,074,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                3,808,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,960,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                60,267,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                57,368,892,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                22,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,330,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                108,173,558,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,403,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |