Bugbuster (バグバスター Bagubasutā?) is a doujinshi that marked Yukito Kishiro's professional debut in 1988 and was the basis for his later manga Aqua Knight. Kishiro has stated that he plans to someday rerelease Bugbuster, but it will not be recognizable from the story of Aqua Knight.
The doujinshi was later released in 1989 as a 130 page volume in A5 size. Kishiro also sold it directly on his website. It has not been translated into English.