Ryo Miyaichi (宮市 亮 Miyaichi Ryō, born 14 December 1992) is a Japanese professional footballer who plays as a winger for FC St. Pauli in the 2. Bundesliga. He has played in the Premier League for clubs such as Arsenal, Wigan Athletic and Bolton Wanderers. He also played for Feyenoord and FC Twente in the Eredivisie. Japan's former head coach Alberto Zaccheroni has said that "Miyaichi's strengths are on the flanks and creating space going forward."