Semi-Annual Consolidated Balance Sheet
| Concept | As at 2025-03-31 | As at 2024-09-30 | 
|---|---|---|
| Semi-annual consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                291,593,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                553,823,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                182,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                21,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -7,176,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -2,536,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                928,158,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,288,419,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                0
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | ||
| Intangible assets | ||
| Intangible assets | 
                                                4,300,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,366,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                323,044,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                274,447,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | ||
| Investment securities | 
                                                287,973,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                213,491,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                29,036,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,056,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -205,207,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -210,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                327,344,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                280,813,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                1,255,503,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,569,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Current liabilities | ||
| Income taxes payable | 
                                                13,048,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                16,049,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                6,456,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                9,395,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                757,145,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                825,228,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | ||
| Long-term borrowings | 
                                                1,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                2,829,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                166,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                5,803,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                8,468,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                762,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                833,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for bonuses | 
                                                13,267,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                19,376,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Share capital | 
                                                2,777,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,777,882,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | ||
| Capital surplus | 
                                                1,390,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,390,548,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -3,570,311,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -3,321,293,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -111,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -111,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Shareholders' equity | 
                                                486,142,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                735,159,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | ||
| Valuation difference on available-for-sale securities | 
                                                6,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Valuation and translation adjustments | 
                                                6,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                378,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                492,554,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                735,537,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                1,255,503,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,569,233,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             |