Erina Yamaguchi (山口 絵里奈, Yamaguchi Erina, born October 19, 1985) is a Japanese big-breasted glamour model (kyonyū gravure idol).
Erina was born October 19, 1985, in Fukuoka Prefecture, Kyūshū island.
In 2004, she graduated from Fukuoka Jo Gakuin Junior & Senior High School (福岡女学院中学校・高等学校) in Minami-ku, Fukuoka City, which was known for having adopted sailor fuku for the first time.
She began her modeling career by posing for Weekly Playboy magazine issued June 19, 2006.
She has so far released one photobook (photographed in Thailand by Yasuhiko Kani) and two DVDs.