Zexcs, Inc. (有限会社ゼクシズ) 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 series such as Sister Princess and Diabolik Lovers. Zexcs is also known for its work in cooperation with its sister company Feel.