Oz Academy Openweight Championship

Statistics
First champion	Aja Kong
Most reigns	Mayumi Ozaki (4 reigns)
Longest reign	Akino; (537 days)
Shortest reign	Mio Shirai; (4 hours, 2 minutes)
Oldest champion	Mayumi Ozaki; (55 years, 183 days)
Youngest champion	Yoshiko; (24 years, 95 days)
Heaviest champion	Aja Kong; (103 kg (227 lb)))
Lightest champion	Chikayo Nagashima; (52 kg (115 lb)))

Oz Academy Openweight Championship
Oz Academy Openweight Championship
	Current design of the championship (2019 – present)
Details
Promotion	Oz Academy
Date established	October 23, 2006
Current champion	Saori Anou
Date won	April 13, 2025
First champion
Statistics
First champion	Aja Kong
Most reigns	Mayumi Ozaki (4 reigns)
Longest reign	Akino; (537 days)
Shortest reign	Mio Shirai; (4 hours, 2 minutes)
Oldest champion	Mayumi Ozaki; (55 years, 183 days)
Youngest champion	Yoshiko; (24 years, 95 days)
Heaviest champion	Aja Kong; (103 kg (227 lb)))
Lightest champion	Chikayo Nagashima; (52 kg (115 lb)))

The Oz Academy Openweight Championship is a women's professional wrestling championship owned by the Oz Academy promotion. The reigning champion is referred to as the "Wizard of Oz". The championship, which is situated at the top of Oz Academy's championship hierarchy, was introduced on March 10, 2007, when Aja Kong defeated Chikayo Nagashima in the finals of a tournament to become the inaugural champion.