Yuki Mizuho, born October 8, 1989, in Hokkaido, Japan, is a former Japanese adult video (JAV) actress. Standing at 163 cm with measurements of 87-58-87 cm (E cup) and blood type B, she debuted in May 2008 under the alias Miyu Kosaka in the 'Girigiri Morning Musume' series by KUKI studio, portraying a former idol hopeful reaching Morning Musume auditions. In 2009, she adopted the stage name Yuki Mizuho, transferring to Tea Powers agency, and gained recognition in niche genres like SM, fetish, masochism, tokusatsu-inspired heroine parodies featuring ryona, violence, tentacles, and prolonged domination scenarios.
Active primarily from 2009 to 2012 with studios such as GIGA, she appeared in over 50 censored titles. Her career ended abruptly around March 2012, with blog and Twitter accounts closed and no official retirement. Limited personal details exist beyond her professional JAV work, making her a cult favorite in fetish communities.