Quarterly Consolidated Balance Sheet
| Concept | As at 2024-05-31 | As at 2024-02-29 | 
|---|---|---|
| Quarterly consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                165,103,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                200,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                14,992,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                13,238,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                49,279,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                30,891,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                409,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                412,818,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                72,920,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Other | — | — | 
| Other, net | 
                                                15,751,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                14,741,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                37,917,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                37,378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                72,670,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,613,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Non-current assets | 
                                                183,508,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                182,885,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                593,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                595,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                2,059,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,301,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                54,708,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,672,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                174,529,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                189,110,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                2,087,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,608,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                18,125,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                18,093,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                20,299,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                27,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                194,828,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                217,060,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity | ||
| Share capital | 
                                                213,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                213,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                63,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                63,128,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                118,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                98,454,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                394,705,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                374,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                3,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,931,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                398,636,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                378,643,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                593,465,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                595,703,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |