Naoyuki Ōi (JP: 大井 直幸) (Born 10 January 1983) is a Japanese pool player. Ōi is best known for reaching the semi-final of the 2012 WPA World Nine-ball Championship, and represented Japan at the World Cup of Pool on six occasions. His title include the 2022 Kanto Open, 2019 Japan Open 10-Ball and the 2018 CBSA Miyun 9-Ball Open.