Zexcs (ゼクシズ, Zekushizu) (mostly written as ZEXCS) is a Japanese animation studio located in Koganei, Tokyo, Japan. It was established on January 23, 1998 by former J.C.Staff producer Tomoko Kawasaki and is known for doing the animation production of a number of series such as Sister Princess and Diabolik Lovers. Zexcs is also known for its work in cooperation with another animation company called Feel.