Nanai is a graduate of Westfields Sports High School located in Fairfield West. Westfields is a sports school that has produced players such as Jarryd Hayne, Liam Fulton, Krisnan Inu, Luke O'Donnell and Mark Minichiello.
Nanai made his debut for the Bulldogs against the Sydney Roosters in Round 16 of the NRL season on 2 July 2007. He scored his first try in Round 19 against the Gold Coast Titans.In 2008 Nanai was the bulldogs leading try scorer with 14 for the season. He is currently playing in the bunderburg Red cup for Saint Johns Eagles effectivley 3rd grade. In 2014 Nanai played the majority of the season for the Auburn Warriors in the Ron Massey Cup
Point Scoring Summary - Bulldogs
- http://www.rleague.com/db/player/n/nanai_heka/index.php Nanai and Skinner called into Junior Kangaroos, Accessed 16 October 2007.