CELSYS, Inc. engages in content production and distribution. It operates through the Service of Creators and User Interface or User Experience (UI or UX) business divisions. The Service of Creators division provides illustration, comic, and animation creation software and web services. It also offers e-book solutions for content creation to distribution. The UI or UX segment handles UI development solutions and network-related products for manufacturers of mobile devices and digital home appliances in the automotive field. Its products include CLIP STUDIO PAINT, CLIP STUDIO, CLIP STUDIO READER, Art Rocket, CLIP STUDIO MODELER, CLIP STUDIO TABMATE, and RETAS STUDIO. The company was founded in May 1991 and is headquartered in Tokyo, Japan.