Ryu Matsuyama is a Japanese group formed in 2012, with Ryu as its credited member. The project has released music under the name Ryu Matsuyama and has also worked in anime.
In that field, the group performed "flow feat. Yuuko Andou", the ED of "Sora wa Akai Kawa no Hotori". Its official website is http://ryumatsuyama.com/.
