1. Kei Nishikori
Kei Nishikori is professional tennis player of Japan and also the richest athlete of Japan, ranked at top in the list of top 10 richest athletes of Japan with an estimated net worth of US $ 32 million.
He is the only tennis player of Japan who ranked in top 10 in the international tennis ranking. He won the ten single men’s tittles and also was the runner up in the US Open in 2014 and the only male player from Asia who reached in the Grand Slam final.