Ryuichi Funai (船井龍一, Funai Ryuichi, born 13 August 1985) is a Japanese professional boxer. He is the current WBO Asia Pacific Super Flyweight Champion and held the Japanese Super Flyweight title. Funai is highly ranked in the Super Flyweight Division at #11 and in 2018-2019 ranked by the IBF at #1 spot. He was born and raised in Tokyo.