Consolidated Balance Sheet
| Concept | As at 2024-05-31 | As at 2024-02-29 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                863,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                883,312,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - other | 
                                                966,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                686,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                189,742,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                137,726,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Prepaid expenses | 
                                                16,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,997,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Inventories | 
                                                477,424,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                362,493,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advance payments to suppliers | 
                                                18,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,415,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -592,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -591,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                1,573,495,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,445,712,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                195,637,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                200,880,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                6,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Property, plant and equipment | 
                                                19,505,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,655,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Intangible assets | 
                                                169,553,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                173,647,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Assets | 
                                                1,769,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,646,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Non-current liabilities | 
                                                17,289,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,768,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Asset retirement obligations | 
                                                7,618,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                7,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deferred tax liabilities | 
                                                789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                789,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                320,282,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                152,394,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts payable - other | 
                                                44,806,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                45,912,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accrued expenses | 
                                                61,671,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                22,793,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Deposits received | 
                                                4,108,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                3,627,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                337,572,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                169,163,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                1,431,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,477,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                401,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                401,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                389,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                389,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                641,578,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                687,446,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -337,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                1,431,560,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,477,429,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                1,769,132,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,646,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                1,624,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,013,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provisions | ||
| Provision for bonuses | 
                                                17,623,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                26,693,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advances received | 
                                                715,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                174,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Net assets | ||
| Shareholders' equity |