Consolidated Balance Sheet
| Concept | As at 2021-03-31 | As at 2020-09-30 | 
|---|---|---|
| Consolidated balance sheet | ||
| Balance sheet | ||
| Assets | ||
| Current assets | ||
| Cash and deposits | 
                                                747,695,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                945,134,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Accounts receivable - trade | 
                                                578,217,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                288,120,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Work in process | 
                                                27,590,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                28,161,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Supplies | 
                                                747,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                761,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Advance payments to suppliers | 
                                                231,390,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                198,824,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                52,494,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,893,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -71,936,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -71,837,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current assets | 
                                                1,626,242,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,478,635,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | ||
| Property, plant and equipment | ||
| Own-used assets | ||
| Land | 
                                                112,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                112,944,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | — | — | 
| Other, net | 
                                                49,418,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                54,411,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Property, plant and equipment | 
                                                162,362,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                167,355,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | 
                                                78,714,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,588,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Software | 
                                                73,709,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                72,077,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                5,005,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                6,510,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Intangible assets | ||
| Other intangible assets | ||
| Investments and other assets | ||
| Long-term loans receivable | 
                                                147,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                153,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                46,667,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                47,434,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Allowance for doubtful accounts | 
                                                -81,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -81,953,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Long-term prepaid expenses | 
                                                35,607,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                20,265,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Investments and other assets | 
                                                290,181,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                348,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current assets | 
                                                531,258,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                594,702,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Assets | 
                                                2,157,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,073,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | ||
| Non-current liabilities | ||
| Long-term borrowings | 
                                                58,160,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                73,910,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Non-current liabilities | 
                                                62,825,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                78,464,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | ||
| Short-term borrowings | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                50,000,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Income taxes payable | 
                                                10,696,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                5,480,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current portion of long-term borrowings | 
                                                31,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                31,500,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Provision for product warranties | 
                                                3,903,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,698,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Other | 
                                                66,247,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                133,956,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Current liabilities | 
                                                314,340,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                285,485,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities | 
                                                377,165,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                363,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | ||
| Shareholders' equity | 
                                                1,777,617,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,708,758,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share capital | 
                                                2,111,946,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,992,531,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Capital surplus | 
                                                724,612,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                605,197,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Retained earnings | 
                                                -946,964,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -777,021,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Treasury shares | 
                                                -111,977,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                -111,949,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Share acquisition rights | 
                                                2,718,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                630,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | 
                                                1,780,336,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                1,709,388,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Liabilities and net assets | 
                                                2,157,501,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
                                                2,073,338,000
                                                
                                                    
                                                        JPY
                                                    
                                                
                                             | 
| Net assets | ||
| Shareholders' equity |