Quarterly Balance Sheet
| Concept | As at 2024-09-30 | As at 2024-03-31 | 
|---|---|---|
| Quarterly balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                349,122,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,417,062,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                36,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                15,869,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                385,477,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,432,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                37,452,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                38,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Investments and other assets | 
                                                2,889,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,980,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Non-current assets | 
                                                40,342,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                41,223,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                425,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,474,155,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                25,017,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,131,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                1,801,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,296,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                110,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                241,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                110,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                241,498,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                4,731,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,731,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                4,711,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                4,711,185,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -9,127,273,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -8,210,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                314,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,231,906,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                750,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                315,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,232,656,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                425,820,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,474,155,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |