Oz Academy Openweight Championship

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Oz Academy Openweight Championship
File:Oz Academy Openweight Championship.jpg
Current design of the championship (2019 – present)
Details
PromotionOz Academy
Date establishedOctober 23, 2006[1]
Current championSaori Anou
Date wonApril 13, 2025
Statistics
First championAja Kong[2]
Most reignsMayumi Ozaki (4 reigns)
Longest reignAkino
(537 days)
Shortest reignMio Shirai
(4 hours, 2 minutes)
Oldest championMayumi Ozaki
(55 years, 183 days)
Youngest championYoshiko
(24 years, 95 days)
Heaviest championAja Kong
(103 kg (227 lb)))[3]
Lightest championChikayo Nagashima
(52 kg (115 lb)))[4]

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".[1] 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.[2]

Reigns

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Aja Kong was the first champion in the title's history.[2] She also holds the records for most reigns, with three.[2][5][6] Akino holds the record for the longest reign, at 537 days, achieved on her first reign. Mio Shirai's only reign of four hours and two minutes[7] is the shortest in the title's history. Overall, there have been twenty-nine reigns shared among eighteen different wrestlers. Mio Momono is the current champion in her first reign.

Title history

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Key
No. Overall reign number
Reign Reign number for the specific champion
Days Number of days held
Defenses Number of successful defenses
+ Current reign is changing daily
No. Champion Championship change Reign statistics Notes Ref.
Date Event Location Reign Days Defenses
1 Aja Kong March 10, 2007 Queen Rebirth Tokyo, Japan 1 309 1[8] Kong defeated Chikayo Nagashima in the finals of a five-woman tournament to become the inaugural champion. [2]
2 Carlos Amano January 13, 2008 The Wizard of OZ 2008 Tokyo, Japan 1 364 2[9] [8]
3 Mayumi Ozaki January 11, 2009 The Wizard of OZ 2009 Tokyo, Japan 1 42 2[10] [9]
4 Dynamite Kansai February 22, 2009 The Country of OZ 2009 Tokyo, Japan 1 175 0[5] [11]
5 Aja Kong August 16, 2009 Plum Hanasaku ~ Country of OZ 2009 Tokyo, Japan 2 36 0[12] [5]
6 Manami Toyota September 21, 2009 OZ-Power is Everything - night 1 Sapporo, Hokkaido, Japan 1 93 0[13] [12]
7 Carlos Amano December 23, 2009 here is No Christmas in the Country of OZ! Tokyo, Japan 2 200 1[14] [13]
8 Kaoru July 11, 2010 Summer Factor Tokyo, Japan 1 273 4[6] [14]
— Vacated April 10, 2011 — — — — — The championship was vacated, when Kaoru suffered an injury and was unable to continue a three-way street fight against Aja Kong and Mayumi Ozaki, forcing the match to be ended in a no contest. [6]
9 Aja Kong April 10, 2011 One Night in Heaven Tokyo, Japan 3 19 0[15] Kong defeated Mayumi Ozaki to win the vacant championship. [6]
10 Ran Yu-Yu April 29, 2011 Heavenly Days in Osaka Osaka, Japan 1 86 0[16] [15]
11 Dynamite Kansai July 24, 2011 Gravity Tokyo, Japan 2 28 0[17] [16]
12 Mayumi Ozaki August 21, 2011 Plum Hanasaku ~ Country of OZ 2011 - night 2: 15th Anniversary ~ Yokohama Dreams Park Yokohama, Kanagawa, Japan 2 217 0[18] This was a four-way elimination match, also involving Aja Kong and Shinobu Kandori. [17]
13 Chikayo Nagashima March 25, 2012 A Kingdom of the Chaos Tokyo, Japan 1 395 2[19] This was a Dress Up Wild Fight 30-minute Time of the Trial match. [18]
14 Akino April 24, 2013 Wednesdays Showdown Tokyo, Japan 1 537 7[20] [19]
15 Tsubasa Kuragaki October 13, 2014 No Answer Tokyo, Japan 1 216 2[21] [22]
16 Akino May 17, 2015 Reincarnation - night 2 Tokyo, Japan 2 21 0[23] [21]
17 Mio Shirai June 7, 2015 Focus - night 1 Tokyo, Japan 1 <1 0 [23]
— Vacated June 7, 2015 Ozabun Spin-off Tokyo, Japan — — — Mio Shirai vacated the championship due to losing to Kaho Kobayashi in a non-title match. [7][24]
18 Sonoko Kato August 23, 2015 Plum Hanasaku ~ Country Of OZ 2015: Yokohama Dreams Park #3 Yokohama, Kanagawa, Japan 1 245 5[25] Kato defeated Hiroyo Matsumoto in a Last Woman Standing match to win the vacant championship. The match started off as a six-woman elimination tag team match, where Kato, Akino and Tsubasa Kuragaki faced Matsumoto, Arisa Nakajima and Hikaru Shida. [23]
— Vacated April 24, 2016 The Artist Tokyo, Japan — — — Kato was stripped of the championship after her title defense against Hiroyo Matsumoto ended in a no contest. [25]
19 Sonoko Kato July 18, 2016 Aja Kong 30th Anniversary ~ Summer Jumbo Kotobuki Tokyo, Japan 2 118 1[26] Kato defeated Mayumi Ozaki in a No Holds Barred Hardcore match to win the vacant championship. [27]
20 Hiroyo Matsumoto November 13, 2016 OZ Academy 20th Anniversary ~ Yokohama Dreams Park DK Yokohama, Kanagawa, Japan 1 350 3[28] [26]
21 Yoshiko October 29, 2017 Yokohama Undersea Unexplored Expedition Yokohama, Kanagawa, Japan 1 217 4 [28]
22 Hikaru Shida June 3, 2018 Rude in June Tokyo, Japan 1 315 2 [29]
23 Mayumi Ozaki April 14, 2019 It is the Dawn of the Era Tokyo, Japan 3 721 4 [30]
24 Sonoko Kato April 4, 2021 OZ Academy Silver Bullet Tokyo, Japan 3 70 1[31] [32]
25 Kaori Yoneyama June 13, 2021 OZ Academy The End Of Bright Tokyo, Japan 1 35 1 [33]
26 Maya Yukihi July 18, 2021 OZ Academy Tournament 25th Fortress Nagoya, Japan 1 <1 0 [34]
— Vacated July 18, 2021 — — — — —
27 Maya Yukihi August 18, 2021 OZ Academy Plum No Hanasaku OZ No Kuni ~ Mayumi Ozaki Debut 35th Anniversary Tokyo, Japan 2 228 1 This was a four-way match, also involving Mayumi Ozaki, Saori Anou and Yumi Ohka. [35]
28 Akino April 3, 2022 OZ Academy Battle Big Bonus In Korakuen Tokyo, Japan 3 644 6 [36]
29 Mio Momono January 7, 2024 OZ Academy The Wizard Of OZ 2024 Tokyo, Japan 1 112 0 [37]
30 Mayumi Ozaki April 28, 2024 OZ Academy Battle Big Bonus 2024 Tokyo, Japan 4 182 3 This was a winner takes all match which was also contested for Ozaki's AAAW Single Championship. [38]
31 Ryo Mizunami October 27, 2024 OZ Academy at Yokohama Budokan 2024 Tokyo, Japan 1 168 1 The winner of the Yokohama Budokan Tournament Kyoto Ranbu got to challenge for the title. [39]
32 Saori Anou April 13, 2025 OZ Academy Battle Big Bonus 2025 Tokyo, Japan 1 394+ 1 [40]

Combined reigns

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File:AKINO 2016.JPG
Three-time champion Akino, who is the longest combined-reigning champion at 1,202 days.

As of May 12, 2026.

† Indicates the current champion
Rank Wrestler No. of
reigns 		Combined
defenses 		Combined
days
1 Akino 3 13 1,202
2 Mayumi Ozaki 4 9 1,172
3 Carlos Amano 2 3 564
4 Sonoko Kato 3 7 433
5 Chikayo Nagashima 1 2 395
6 Aja Kong 3 1 364
7 Hiroyo Matsumoto 1 3 350
8 Hikaru Shida 1 2 315
9 Kaoru 1 4 273
10 Saori Anou † 1 1 394+
11 Maya Yukihi 2 1 228
12 Yoshiko 1 4 217
13 Tsubasa Kuragaki 1 2 216
14 Dynamite Kansai 2 0 203
15 Ryo Mizunami 1 1 168
16 Mio Momono 1 0 112
17 Manami Toyota 1 0 93
18 Ran Yu-Yu 1 0 86
19 Kaori Yoneyama 1 1 35
20 Mio Shirai 1 0 <1

References

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