Ran Yu-Yu (born Tomoko Miyaguchi born August 17, 1975) is a retired Japanese professional wrestler. Best known as a tag team wrestler, Yu-Yu held the JWP Tag Team Championship a record seven times, the Daily Sports Women's Tag Team Championship three times, the AAAW Tag Team Championship and the Oz Academy Tag Team Championship twice each and the International Ribbon Tag Team Championship and Wave Tag Team Championship once each. Yu-Yu also excelled in singles competition, most notably winning the JWP Openweight Championship and Oz Academy Openweight Championship. She finished her 18-year career on December 9, 2012.