Ryūkōsai Jokei (Japanese: 流光斎 如圭) was a painter, illustrator, and designer of ukiyo-e-style Japanese woodblock prints in Osaka, who was active from about 1777 to 1809. He was a student of Shitomi Kangetsu (1747–1797), who in turn was the son and pupil of Tsukioka Settei (1710–1786). Ryūkōsai is considered to be either the founder or one of the founders of the Osaka school of ukiyo-e. He is best known for his portraits of actors. His prints are mostly in the hosoban format.
- Newland, 2005, p. 482
- Roberts, 1976, p. 134
- Keyes, Roger S. & Keiko Mizushima, The Theatrical World of Osaka Prints, Philadelphia, Philadelphia Museum of Art, 1973, 238.
- Lane, Richard. (1978). Images from the Floating World, The Japanese Print. Oxford: Oxford University Press. ISBN 9780192114471; OCLC 5246796
- Newland, Amy Reigle. (2005). Hotei Encyclopedia of Japanese Woodblock Prints. Amsterdam: Hotei. ISBN 9789074822657; OCLC 61666175
- Roberts, Laurance P. (1976). A Dictionary of Japanese Artists. New York: Weatherhill. ISBN 9780834801134; OCLC 2005932