Semi-Annual Consolidated Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                232,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                211,333,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                43,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -44,919,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -53,378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                482,573,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                461,324,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                1,373,378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,362,862,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Land | 
                                                983,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                983,473,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                42,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                34,040,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                7,932,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,042,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                173,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                157,834,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Long-term loans receivable | 
                                                310,030,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                313,214,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                247,348,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                230,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -383,555,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -385,592,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                1,555,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,529,739,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                2,037,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,991,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                11,335,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,689,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                164,033,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                162,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                261,263,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                242,051,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Asset retirement obligations | 
                                                69,095,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,858,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                83,941,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                89,317,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                244,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                244,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                505,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                486,211,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for retirement benefits for directors (and other officers) | 
                                                31,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                1,364,583,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,363,288,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                842,121,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                840,826,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -698,831,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -722,435,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -18,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                1,507,854,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,481,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                17,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                17,061,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,183,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                7,513,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,008,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                1,532,428,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,504,852,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                2,037,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,991,063,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |