Semi-Annual Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                10,151,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,849,304,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,002,885,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                712,565,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                41,529,248,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,492,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                57,886,251,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                59,105,983,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Tools, furniture and fixtures | — | — | 
| Tools, furniture and fixtures, net | 
                                                127,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                10,803,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,803,731,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                405,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                562,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                365,566,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                387,332,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                312,631,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                352,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                34,736,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,988,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                11,025,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,457,003,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                12,156,659,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                12,475,784,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                312,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                174,873,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                583,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                589,487,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -10,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -10,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                70,408,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,969,101,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                111,937,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,461,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                3,479,569,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,313,450,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                891,847,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                743,214,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                113,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                443,433,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                308,045,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                11,177,844,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                10,054,894,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Unearned revenue | 
                                                2,367,438,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,027,169,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                539,682,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,202,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                38,068,543,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                39,641,008,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Bonds payable | 
                                                6,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                20,981,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,730,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                4,222,522,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,225,522,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                49,246,387,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,695,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for retirement benefits for directors (and other officers) | 
                                                6,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                148,035,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                144,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                56,527,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                51,626,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for bonuses for directors (and other officers) | 
                                                14,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,850,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Share capital | 
                                                6,826,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,826,100,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | ||
| Capital surplus | 
                                                6,985,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,982,890,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                43,272,142,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                42,025,075,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -1,491,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,546,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                55,592,262,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,287,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                2,102,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,413,935,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                4,405,963,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,822,632,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                62,691,339,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                60,765,822,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                13,022,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,923,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                111,937,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                110,461,725,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |