Yumiko Abe

is a Japanese professional wrestler better known by the ring name Yumi Ohka (桜花 由美 Ōka Yumi). Originally trained by the now defunct JDStar promotion, Ohka now works for Oz Academy and Pro Wrestling Wave. She is currently in her second reign as the Wave Single Champion, while also being a former Oz Academy Tag Team Champion and Wave Tag Team Champion. She is the managing director of Zabun Co., Ltd., which owns Pro Wrestling Wave November 27, Ohka and Matsumoto defeated the Oz Academy Tag Team Champions, Carlos Amano and Manami Toyota, in a non-title match.On February 26, 2012, Ohka, Matsumoto, Nagashima and Yu-Yu had a four-way match to determine the number one contender to their leader Mayumi Ozaki's Oz Academy Openweight Championship. Ohka was eliminated from the match by the eventual winner, Chikayo Nagashima.On February 10, 2013, Ohka and Mayumi Ozaki defeated Akino and Ayumi Kurihara to win the Oz Academy Tag Team Championship. They, however, lost the title just 28 days later in their first defense to the team of Hiroyo Matsumoto and Tomoka Nakagawa of Jungle Jack 21. Ohka attempted to recapture the title from Matsumoto and Nakagawa with new Seikigun partner Mio Shirai on September 15, but the two were unsuccessful.When Shirai was given the storyline booking rights for Oz Academy's March 2 event, she handed Ohka and Mayumi Ozaki a rematch for the Oz Academy Tag Team Championship. The two were, however, defeated in the title match by Matsumoto and Nakagawa. On December 13, 2015, Ohka received her first ever shot at the Oz Academy Openweight Championship, but was defeated by the defending champion, Sonoko Kato North America (2011–present)