Kazuhisa Watanabe (渡邉 一久, Watanabe Kazuhisa, born May 18, 1983) is a Japanese boxer, kickboxer and mixed martial artist currently competing in K-1 and Dream in the featherweight division.
On October 13, 2005, he defeated Norihisa Tomimoto by unanimous decision to claim the Japanese Featherweight Championship.
He defended the title twice, against Motokazu Abe and Ikuto Kobayashi, before losing it to Koji Umetsu on October 14, 2006.
On February 23, 2009, he made his kickboxing debut against Daisuke Uematsu at the K-1 World MAX 2009 Japan Tournament, losing via unanimous decision.
This would be his first and only victory in K-1 as he went on to lose his next three bouts against Cheon Jae-Hee, Daiki Hata and Kazuyuki Miyata.