Miyaguchi started her
professional wrestling career in 1994, working under her real name in
JWP Joshi Puroresu. Following the folding of Gaea Japan in 2005, Yu-Yu began working as a
freelancer though effectively making
Oz Academy her new home promotion. In Oz Academy, Yu-Yu became a two-time
Tag Team Champion with
Akino, On April 29, 2011, Yu-Yu defeated Kong to win the
Oz Academy Openweight Championship. Shortly after her longtime tag team partner Toshie Uematsu had announced her retirement, Yu-Yu followed suit and announced that she would retire before the end of 2012. On November 11, Oz Academy founder
Mayumi Ozaki was announced as Yu-Yu's opponent for her retirement match on December 9. Having quit Jungle Jack 21 and joined the
villainous Seikigun stable on September 23, 2011, in order to get another shot at the Oz Academy Openweight Championship, Yu-Yu reunited with her old stablemates for her final self-produced event, titled ''Starlight's Regret'', on December 2, 2012, which saw Yu-Yu, Aja Kong, Akino,
Hiroyo Matsumoto and
Tomoka Nakagawa defeat Carlos Amano,
Chikayo Nagashima,
Meiko Satomura,
Sonoko Kato and
Tsubasa Kuragaki in a ten-woman tag team match that lasted over an hour. On December 6, Yu-Yu wrestled her final matches for her original home promotion, JWP. First she wrestled
Arisa Nakajima to a fifteen-minute time limit draw and then won a twelve-woman main event
battle royal, where all participants were dressed as her, scoring the last elimination over Kazuki. On December 9, Yu-Yu was defeated by Ozaki in her advertised retirement match, following interference from Ozaki's Seikigun stable. However, immediately afterwards, Yu-Yu teamed with Carlos Amano to defeat Ozaki and Dynamite Kansai, pinning Ozaki for the win in the final match of her career. ==Championships and accomplishments==