Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Non-current assets | ||
| Investments and other assets | ||
| Investments and other assets | 
                                                49,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                49,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                49,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | ||
| Cash and deposits | 
                                                1,098,274,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                527,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                44,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                35,621,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advance payments to suppliers | 
                                                28,116,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,102,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                123,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,216,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Raw materials and supplies | 
                                                65,292,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                43,783,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                1,498,587,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                817,769,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                139,173,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                104,570,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other assets | ||
| Assets | 
                                                1,548,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                867,275,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Non-current liabilities | 
                                                126,148,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                154,015,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                47,225,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                421,595,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                359,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                203,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                139,436,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                74,210,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,425,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                15,157,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                547,743,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                513,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                927,748,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                279,166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                647,141,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                26,919,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,322,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -26,638,661,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -26,092,962,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -3,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                72,600,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                74,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                1,000,348,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                353,666,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                1,548,092,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                867,275,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Contract liabilities | 
                                                128,779,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                197,432,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term accounts payable - other | 
                                                78,922,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                106,849,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other liabilities | — | — | 
| Other liabilities | — | — | 
| Net assets | ||
| Shareholders' equity | ||
| Capital surplus | ||
| Retained earnings |