High Quality Content by WIKIPEDIA articles! The Daihatsu Copen is a 2-door roadster with an aluminium retractable hardtop built by the Japanese car company Daihatsu. It first debuted at the 1999 Tokyo Motor Show, as the Daihatsu Copen concept. In two years, the OFC-1 was also completed as a precursor to the Copen, based on Daihatsu`s front-wheel-drive light-car platform.