Ryo Miyaichi (宮市 亮, Miyaichi Ryō, born 14 December 1992) is a Japanese professional footballer who plays as a winger for St. Pauli in the 2. Bundesliga. He played for Japan national team.
Miyaichi has played in the Premier League with clubs such as Arsenal, Wigan Athletic and Bolton Wanderers. He as well featured for Feyenoord and Twente in the Eredivisie. Japan's former manager Alberto Zaccheroni has said that "Miyaichi's strengths are on the flanks and creating space going forward."
Miyaichi was born into a sporting family. His brother, Tsuyoshi, was also a football player; and his father, Tatsuya Nomoura, was a basketball player who played for and later managed the Toyota Motors basketball club. Miyaichi started playing football in his elementary school years at Sylphid F.C. in Nagoya. He entered Chukyodai Chukyo High School and played for the school football club. In the 2010 season, the team advanced to the All Japan High School Soccer Tournament but were defeated in the first round in a match televised across Japan.