Haruki Mizuno (born July 21, 1979 in Chiba Prefecture) is a Japanese AV idol, known for her beautiful eyes and big breasts. She debuted in the adult video business in 1997.

Though her first video appearance was nearly 10 years ago, and she seems to have retired from the field in 2004, her popularity is such that as of September, 2006, there are still a total of 50 video items to her credit. Fifteen volumes of photo books either devoted entirely to her, or in which she appears with other models are also currently in print.