Ryōji, Ryoji or Ryouji (written: 良二, 良治, 良司, 良仁, 涼至, 亮二, 亮司, 了滋, 領二 or 諒司) is a masculine Japanese given name. Notable people with the name include:
Ryoji Aikawa (相川 亮二) (born 1976), Japanese baseball player
Ryōji Akiyama (秋山 亮二) (born 1942), Japanese photographer
Ryōji Arai (荒井 良二) (born 1956), Japanese illustrator
Ryōji Chūbachi (中鉢 良治) (born 1947), Japanese businessman
Ryoji Fukui (福井 諒司) (born 1987), Japanese footballer
Ryoji Ikeda (池田 亮司) (born 1966), Japanese sound artist
Kaihō Ryōji (海鵬 涼至) (born 1973), Japanese sumo wrestler
Ryoji Katsuki (香月 良仁) (born 1984), Japanese baseball player
Ryoji Kawamoto (川本 良二) (born 1982), Japanese footballer
Ryōji Minagawa (皆川 亮二) (born 1964), Japanese manga artist
Ryoji Nakagawa (中川 了滋) (born 1939), Japanese judge
Ryoji Nakata (中田 亮二) (born 1987), Japanese baseball player
Ryōji Noyori (野依 良治) (born 1938), Japanese chemist
Ryoji Sai (崔 領二) (born 1980), Japanese professional wrestler
Tamakasuga Ryōji (玉春日 良二) (born 1972), Japanese sumo wrestler
Ryōji Uehara (上原 良司) (1922–1945), Imperial Japanese Army flight captain
Ryoji Ujihara (氏原 良二) (born 1981), Japanese footballer
Ryoji Yamanaka (born 1983), Japanese footballer
