The following champion history features the NWA United National Heavyweight Championship
Champion history[]
| Wrestler: | Times: | Date: | Location: | Notes: |
|---|---|---|---|---|
| Masato Tanaka | 1 | January 31, 2004 | Tokyo, Japan | Defeated Steve Corino in an Indian strap match on the Zero-One*U$A tour. Tanaka wrestled this match as "Masa Tanaka", but defended the title under his full name. |
| Takao Ōmori | 1 | October 8, 2004 | Tokyo, Japan | This was a steel cage match on the New Truth Whirlpool-1 II tour. |
| Vacated | January 23, 2005 | Vacated due to Ōmori winning the World Heavyweight Championship of AWA Superstars of Wrestling. | ||
| C.W. Anderson | 1 | March 27, 2005 | Tokyo, Japan | Defeated Kohei Sato on the Strong Wind & Thunder tour. |
| Vacated | February 3, 2006 | Vacated due to a back injury. | ||
| Kohei Sato | 1 | February 26, 2006 | Tokyo, Japan | Defeated Ryouji Sai on the Happening tour. |
| Ryouji Sai | 1 | November 11, 2006 | Osaka, Japan | Won the title on the MAX Around tour. |
| Daisuke Sekimoto | 1 | March 8, 2007 | Tokyo, Japan | Won the title at Ex-Impact. |
| Yoshihito Sasaki | 1 | November 13, 2007 | Tokyo, Japan | Won the title on the Believe Your Way tour. |
| Sandy Beach | 1 | February 11, 2008 | Nagoya, Japan | Won the title on the Solidarity tour. |
| Yoshihito Sasaki | 2 | March 29, 2008 | Sapporo, Japan | Won the title on the Whirlwind tour. |
| Vacated | April 25, 2008 | Vacated due to injury. | ||
| Kengo Mashimo | 1 | May 4, 2008 | Chiba, Japan | Defeated Ryouji Sai at Kaientai Dojo's GWSP6 Kengo Mashimo Produce. |