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 | 
                                                914,080,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                640,084,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                41,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                100,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                2,904,918,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,025,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                2,600,848,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,617,722,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Buildings | — | — | 
| Buildings, net | 
                                                656,439,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                681,232,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Land | 
                                                1,680,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,680,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Construction in progress | 
                                                64,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                64,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                200,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                192,314,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                69,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                81,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                24,856,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,586,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                354,019,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                337,976,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Distressed receivables | — | — | 
| Allowance for doubtful accounts | 
                                                -3,200,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,482,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                332,364,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                318,873,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                3,024,524,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,036,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                5,929,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,062,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Short-term borrowings | 
                                                987,142,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,166,294,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                24,193,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,507,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                230,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                452,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                2,090,674,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,714,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                831,902,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                334,948,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term borrowings | 
                                                656,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                177,598,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                1,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,728,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                2,922,576,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,049,732,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Provision for retirement benefits | 
                                                169,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                151,271,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                4,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                87,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                79,879,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Net assets | ||
| Share capital | 
                                                664,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                664,740,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | ||
| Capital surplus | 
                                                268,757,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                267,245,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                2,150,127,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,163,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -89,945,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -94,534,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                2,993,680,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,000,895,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                13,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                13,186,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                11,609,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,006,867,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,012,504,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                5,929,443,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,062,236,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |