United National Heavyweight Championship (Zero1)

The United National Heavyweight Championship[1] (often shortened to UN Championship) was a professional wrestling title in the Japanese promotion Pro Wrestling Zero1. It is one of ZERO1's top two singles titles, along with the Zero1 World Heavyweight Championship. The UN title was created on January 31, 2004, when Masato Tanaka defeated Steve Corino in an Indian strap match, wrestling as Masa Tanaka.[2][3] It was founded at a time when Zero1 was a member of the National Wrestling Alliance; since the two organizations' parting in late 2004, the NWA does not recognize or sanction it, though it retains the NWA initials. There have been a total of 26 recognized champions who have had a combined 32 official reigns. The title was revived by NWA Pro Wrestling in January 2011. NWA began recognizing title and sanctioning title matches in January 2011 after Zero1 was reinstated as a member of NWA. NWA stopped sanctioning the title after Zero1 left the NWA again in 2011.

Not to be confused with NWA National Heavyweight Championship or NWA United National Championship.
United National Heavyweight Championship
United National Championship
Details
PromotionPro Wrestling Zero1
Date establishedJanuary 31, 2004
Date retiredMay 3, 2020
Other name(s)
NWA United National Heavyweight Championship (Zero1)
Statistics
First champion(s)Masato Tanaka
Most reignsShito Ueda/Masakado (3)
Longest reignKengo Mashimo (937 days)
Shortest reignPaul Tracy (2 days)
Youngest championToshiki Iwaki (20 years, 161 days)
Heaviest championShogun Okamoto (264 lb)
Lightest championSean Guinness and Ikuto Hidaka (176 lb)

Title history
Key
No. Overall reign number
Reign Reign number for the specific champion
Days Number of days held
Defenses Number of successful defenses
<1 Reign lasted less than a day
+ Current reign is changing daily
No. Champion Championship change Reign statistics Notes Ref.
Date Event Location Reign DaysDefenses
(NWA) National Wrestling Alliance / Pro Wrestling Zero1 (Zero1)
1 Masa Tanaka January 31, 2004 U$A – Day 2 Tokyo, Japan 1 2515 Defeated Steve Corino in an Indian strap match. [3]
Pro Wrestling Zero1 (Zero1)
2 Takao Omori October 8, 2004 New Whirlpool-1 Truth II 2004 – Day 3 Tokyo, Japan 1 1071 This was a steel cage match. [4]
— Vacated January 23, 2005 — — — —— Vacated due to Omori winning the World Heavyweight Championship of AWA Superstars of Wrestling. [2]
3 C. W. Anderson March 27, 2005 MAX Strong Wind & Thunder – Day 5 Tokyo, Japan 1 3130 Defeated Kohei Sato. [5]
— Vacated February 3, 2006 — — — —— Vacated due to a back injury. [6]
4 Kohei Sato February 26, 2006 Happening – Day 5 Tokyo, Japan 1 2585 Defeated Ryouji Sai. [7]
5 Ryouji Sai November 11, 2006 Max Around '06 – Day 8 Osaka, Japan 1 1171 [8]
6 Daisuke Sekimoto March 8, 2007 Max Satisfaction – Day 1: Ex-Impact Tokyo, Japan 1 2503 [9]
7 Yoshihito Sasaki November 13, 2007 Believe Your Way 2007 – Day 8 – Shinjiro Otani, Takao Omori, Tatsuhito Takaiwa & Kamikaze 15th Anniversary Tokyo, Japan 1 901 [10]
8 Sandy Beach February 11, 2008 Solidarity – Day 3 Nagoya, Japan 1 470 [11]
9 Yoshihito Sasaki March 29, 2008 Whirlwind – Day 7 Sapporo, Japan 2 270 [12]
— Vacated April 25, 2008 — — — —— Vacated due to injury. [2]
10 Kengo Mashimo May 4, 2008 Kaientai Dojo's GWSP6 2008 – Day 4: Kengo Mashimo Produce Chiba, Japan 1 9372 Defeated Ryouji Sai.
— Vacated November 27, 2010 — — — —— Vacated due to inactivity. [2]
(NWA) National Wrestling Alliance / Pro Wrestling Zero1 (Zero1)
11 Hartley Jackson February 19, 2011 NWA Pro Australia: Meltdown 2011 Adelaide, Australia 1 2638 Defeated Robby Heart to become the new Zero1 / NWA United National Champion.
12 Shito Ueda November 9, 2011 Yarisugi Forever II Tokyo, Japan 1 130 [13]
13 Paul Tracy November 22, 2011 God's of Shimane Country Tour 2011 – Day 1 Matsue, Japan 1 20 [13]
14 Shito Ueda November 24, 2011 God's of Shimane Country Tour 2011 – Day 3 Kumamoto, Japan 2 2554
15 Yusaku Obata August 5, 2012 Midsummer Festival ~ Fire Festival 2012 – Day 11 Tokyo, Japan 1 720
16 James Raideen October 16, 2012 World Tokyo, Japan 1 2571
Pro Wrestling Zero1 (Zero1)
17 Ikuto Hidaka June 30, 2013 Fusion Nagoya, Japan 1 300
18 Zeus July 30, 2013 Fire Festival (2013) – Day 8 Osaka, Japan 1 1700
19 Tama Williams January 16, 2014 Live event Tokyo, Japan 1 1992
20 Hideki Suzuki August 3, 2014 Fire Festival (2014) Tokyo, Japan 1 2752
21 Kamikaze May 5, 2015 Live event Tokyo, Japan 1 1412
22 Toshiki Iwaki September 23, 2015 Live Event Tokyo, Japan 1 390 Won the match by disqualification; awarded the title by referee Katsumi Sasazaki, who was assaulted by Kamikaze during the match. [14]
23 Kamikaze November 1, 2015 Live Event Tokyo, Japan 2 220
24 Yoshikazu Yokoyama November 23, 2015 Live Event Tokyo, Japan 1 260
25 Masakado December 19, 2015 Live Event Tokyo, Japan 3 1903 Masakado previously held the title under the name Shito Ueda.
26 Buffa June 26, 2016 Super Fireworks Captain Super Fireworks Kakegawa, Japan 1 1331
27 Hartley Jackson November 6, 2016 Kohei Sato 15th Anniversary Show Tokyo, Japan 2 1160 This was a three-way match, also involving Kamikaze. [15]
28 Sean Guinness March 2, 2017 Shinsei Zero1 Dream Series ~ Birthday Party Tokyo, Japan 1 1820
— Vacated August 31, 2017 — — — —— Guinness relinquished the title to focus on wrestling as a junior heavyweight.
29 Super Tiger September 30, 2017 Shinjiro Otani & Tatsuhito Takaiwa 25th Anniversary Convention Tokyo, Japan 1 1903 Defeated Hartley Jackson to win the vacant title. [16]
29 Chris Vice April 8, 2018 15th Yasukuni Shrine Festival Tokyo, Japan 1 561
30 Shogun Okamoto June 3, 2018 Shinsei Zero1 Sapporo First Landing ~ No Gravity Warrior Sugi Sapporo First Visit Sapporo, Japan 1 2802 [17]
31 Towa Iwasaki March 10, 2019 Sayonara West Holy Land Hakata Star Lanes Fukuoka, Japan 1 3143 [18]
32 Chris Vice January 18, 2020 Skill Up To The Future ~ Towards A Dream Tokyo, Japan 2 1060 [19]
— Vacated May 3, 2020 — — — —— Vacated due to Vice winning the World Heavyweight Championship; title abandoned.

Combined reigns

As of October 25, 2023.

† Indicates the current champion
Rank Wrestler No. of
reigns		 Combined
defenses		 Combined days
1 Kengo Mashimo12937
2 Shito Ueda/Masakado37458
3 Hartley Jackson28379
4 Towa Iwasaki13314
5 C. W. Anderson10313
6 Shogun Okamoto12280
7 Hideki Suzuki12275
8 Kohei Sato15258
9 James Raideen11257
10 Masato Tanaka15251
11 Daisuke Sekimoto13250
12 Tama Williams12199
13 Super Tiger13190
14 Sean Guinness10182
15 Zeus10170
16 Kamikaze22163
17 Buffa11133
18 Ryouji Sai11117
Yoshihito Sasaki21117
20 Takao Omori11107
21 Chris Vice21106
22 Yusaku Obata1072
23 Sandy Beach1047
24 Toshiki Iwaki1039
25 Ikuto Hidaka1030
26 Yoshikazu Yokoyama1026
27 Paul Tracy102

See also

References
  1. "Pro Wrestling Zero1 official results archives" (in Japanese). ZERO-ONE-MAX.com. Archived from the original on 2007-07-26. Retrieved 2007-07-10.
  2. "NWA United National Heavyweight Championship official title history". ZEROONEUSA.com. Retrieved 2007-07-10.
  3. "Zero-One*U$A tour results" (in German). PuroLove.com. Retrieved 2007-07-10.
  4. "Zero-One New Truth Whirlpool-1 II tour official results". ZEROONEUSA.com. Archived from the original on 2007-09-28. Retrieved 2007-07-10.
  5. "ZERO1-MAX Strong Wind & hinder tour results". ZEROONEUSA.com. Archived from the original on 2007-09-28. Retrieved 2007-07-10.
  6. "NWA United National Heavyweight Championship title history". Wrestling-Titles.com. Retrieved 2007-07-10.
  7. "ZERO1-MAX Happening tour results". ZEROONEUSA.com. Retrieved April 29, 2012.
  8. "ZERO1-MAX MAX Around tour results". ZEROONEUSA.com. Retrieved April 29, 2012.
  9. "ZERO1-MAX Ex-Impact results". ZEROONEUSA.com. Archived from the original on February 15, 2009. Retrieved April 29, 2012.
  10. "Zero1-Max Believe Your Way tour results" (in German). PuroLove.com. Retrieved 2007-11-13.
  11. "ZERO1-MAX Solidarity tour results". ZEROONEUSA.com. Retrieved April 29, 2012.
  12. "ZERO1-MAX Whirlwind tour results". ZEROONEUSA.com. Archived from the original on 2008-04-12. Retrieved 2008-04-27.
  13. "Pro-Wrestling ZERO1 Results: 2011" (in German). PuroLove.com. Retrieved 2011-11-15.
  14. "５月デビューの磐城がまさかの戴冠". Daily Sports Online (in Japanese). Retrieved 2015-10-05.
  15. Dark angel (November 7, 2016). "Zero1: Results «Kohei Sato Debut 15th Anniversary Show» - 06/11/2016". superluchas.com. Retrieved June 3, 2021.
  16. Pro Wrestling Zero1 (September 30, 2017). ZERO1 後楽園大会 2017年09月30日(土) 試合開始18時00分（17時15分開場）. z-1.co.jp. Retrieved October 1, 2017.
  17. Dark angel (June 6, 2018). "Zero1: »Shinsei Zero1 Sapporo First Landing» Masato Tanaka is crowned". superluchas.com. Retrieved June 3, 2021.
  18. Pro Wrestling Zero1 (March 10, 2019). ZERO1備長吉兆やpresents『プロレスリングZERO1博多大会～さよならプロレス・西の聖地（メッカ）！博多スターレーン～』. z-1.co.jp. Retrieved June 2, 2021.
  19. Pro Wrestling Zero1 (January 18, 2020). ZERO1Skill up to the future～夢へ向かって～ 2020年01月18日(土) 試合開始18時00分（開場17時30分）. z-1.co.jp. Retrieved January 18, 2020.
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