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 | 
                                                2,609,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,435,996,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Securities | 
                                                300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                300,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                37,901,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                48,427,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                3,391,243,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,683,809,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                52,275,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                65,837,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                12,753,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                24,119,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investments and other assets | 
                                                437,562,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                68,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                502,591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                158,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                3,893,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,842,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Accounts payable - trade | 
                                                348,700,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                553,241,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                45,350,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                23,737,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                127,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                105,702,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                532,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                700,031,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Non-current liabilities | 
                                                18,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                18,124,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                17,926,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                550,349,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                717,957,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Net assets | ||
| Share capital | 
                                                1,838,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,838,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | ||
| Capital surplus | 
                                                1,858,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,858,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | ||
| Retained earnings | 
                                                -353,091,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -575,090,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -2,016,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -1,724,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                3,341,868,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,120,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                -1,427,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                645,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                1,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,990,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                3,343,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,124,151,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                3,893,835,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,842,109,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |