Ryoko Moriyama (森山 良子, Moriyama Ryōko) (born January 18, 1948) is a Japanese folk singer. Her father is Hisashi Moriyama, a pioneer of Japanese jazz. Her son Naotarō Moriyama is a singer. Her first cousin Hiroshi Kamayatsu is also a musician. She is known as the Japanese Joan Baez, or the Queen of college folk. Her songs tend not to become best sellers but her most famous song is "Satokibi Batake". This song is about a tragedy during the Battle of Okinawa. The song's full version is 10 minutes.