Johannes "Johan" Roijakkers (born September 15, 1980) is a Dutch basketball coach, currently for BG Göttingen of the Basketball Bundesliga. His first head coach job was with BC Prievidza in Slovakia, where he won the national title. In 2012, he left for BG Göttingen. In the 2013–14 season, he promoted to the Bundesliga with Göttingen. The team beat Crailsheim Merlins in the Finals and was named the ProA champion.