Oz Academy - Japanese Lady Wrestling

Oz Academy Women's Professional Wrestling (or Oz Academy for short) was founded in 1998 by legendary Japanese female professional wrestler, Mayumi Ozaki.
Although Mayumi considers the start to be earlier in 1996 because that was when the actual stable itself was formed.
Some of the very best in joshi puroresu have worked for Oz.

The promotion itself has two titles, the OZ Academy Openweight Championship and the OZ Academy Tag Team Championship.
As far as I know, Jungle Jack 21 (Hiroyo Matsumoto and Tomoka Nakagawa) still have the tagteam belts and Akino is the Openweight Champion.

Oz Academy 12th Annual - January 2014