Taufatofua represented his country in taekwondo at Rio 2016 and also featured in cross-country skiing at the Pyeongchang 2018 Winter Games.
He went viral as Tonga's flag bearer in Rio, having completed the task shirtless and oiled, and now appears keen to compete in Tokyo in an aquatics event.
"I will, hopefully, be the first male in history to do three completely different Olympic sports in three different arenas," he told Radio New Zealand, as reported by NZ Herald.