Oz Academy is a Japanese joshi puroresu or women's professional wrestling promotion founded by Mayumi Ozaki. The promotion's full official name is Oz Academy Women's Professional Wrestling . In addition to the contracted members of the roster, Oz Academy has also employed some of the top freelancers in all of joshi puroresu, including Ayumi Kurihara, Hiroyo Matsumoto, Manami Toyota and Tomoka Nakagawa. The promotion has a television deal with Gaora.

Chikayo Nagashima is a Japanese professional wrestler. She started her career in 1995, working for the Gaea Japan promotion, where she became a one-time AAAW Single Champion and a record five-time AAAW Tag Team Champion. She was also notably one of the four founding members of the Oz Academy stable. Following the folding of Gaea Japan in 2005, Nagashima affiliated herself with Oz Academy, now a full-time promotion, where she has become a three-time Oz Academy Tag Team Champion and a one-time Oz Academy Openweight Champion, holding the record for the longest reign in the title's history. Nagashima remained with Oz Academy until August 2015, after which she became a freelancer.