Kensuke Sasaki (佐々木 健介, Sasaki Kensuke) is a Japanese retired professional wrestler, mixed martial artist, and founder of the now-defunct wrestling promotion Diamond Ring.

Sasaki is the first of two men ever to hold all three of puroresu's major heavyweight titles (the IWGP Heavyweight Championship, the Triple Crown Heavyweight Championship, and the GHC Heavyweight Championship), the other being Yoshihiro Takayama. Sasaki also competed in MMA and won both fights by submission, remaining undefeated in mixed martial arts competition.