Semi-Annual Balance Sheet
| Concept | As at 2023-12-31 | As at 2023-03-31 | 
|---|---|---|
| Semi-annual balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                1,997,363,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,543,928,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                236,706,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                219,625,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -12,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -21,034,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                6,315,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,784,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                7,798,226,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,099,449,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                3,074,190,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,018,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets | 
                                                1,338,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                814,067,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation | 
                                                -404,372,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -589,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Leased assets, net | 
                                                934,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                224,794,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                649,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                691,993,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                3,303,530,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,109,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other, net | 
                                                119,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                146,089,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accumulated depreciation and impairment | 
                                                -3,183,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,963,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                75,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,983,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                75,846,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                88,983,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                456,544,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                333,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                499,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                383,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax assets | 
                                                24,389,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,112,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                53,892,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                62,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -54,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -54,150,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                8,373,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,571,596,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                14,689,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,356,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                1,958,550,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,856,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                351,058,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,414,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                21,347,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,638,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                984,942,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,091,644,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                6,590,557,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,861,270,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received | 
                                                462,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                151,046,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                3,016,275,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                541,958,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                2,035,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Lease liabilities | 
                                                473,167,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                58,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                9,606,833,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,403,228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for bonuses | 
                                                142,463,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                69,523,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                131,054,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,580,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | ||
| Capital surplus | 
                                                2,254,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,254,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                1,159,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,377,685,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -52,860,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -57,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                3,461,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,674,641,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                152,042,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                71,250,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                433,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                227,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                5,082,786,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,953,071,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                14,689,619,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,356,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |