Claim: Jumbo Tsuruta, a Japanese professional wrestler who wrestled for All Japan Pro Wrestling (AJPW) for most of his career, is the longest-reigning champion wrestler in the history of NWA United National Championship.
Evidence: Tomomi "Tommy" Tsuruta (鶴田 友美, Tsuruta Tomomi, March 25, 1951 – May 13, 2000), better known by his ring name Jumbo Tsuruta (ジャンボ鶴田, Janbotsuruta), was a Japanese professional wrestler who wrestled for All Japan Pro Wrestling (AJPW) for most of his career, and is well known for being the first ever Triple Crown Heavyweight Champion, having won the PWF Heavyweight Championship, the NWA United National Championship, and the NWA International Heavyweight Championship, and unifying the three titles. Jumbo Tsuruta