A professional competitor from 2005 to 2020, Mizugaki also competed for Absolute Championship Berkut, WEC, Shooto, and Cage Force.
Mizugaki began his mixed martial arts career and competed in respected Japanese promotions Shooto and Cage Force.
[7] Mizugaki faced Brazilian jiu-jitsu ace Rani Yahya on April 24, 2010, at WEC 48.
[11][12] Mizugaki showed good take down defense but was hurt via punches toward the end of the first round, allowing Faber to take his back.
After Faber was able to sink in a rear naked choke, Mizugaki refused to tap and as a result, was rendered unconscious.
[14] Mizugaki was expected to face Francisco Rivera on March 3, 2011, at UFC Live: Sanchez vs.
[15] However, Rivera had to withdraw from the bout due to injury, and was replaced by UFC newcomer Reuben Duran.
[22] Despite the loss on the scorecards, UFC president Dana White felt Mizugaki won the bout and stated in the post-fight press conference that he would be paid a win bonus.
[33] However, on March 27, the UFC announced that Dillashaw was moved up to the main event to face Bantamweight champion Renan Barão.
[37] Mizugaki lost the fight via TKO in the first round after Cruz got a take-down and landed several punches against the cage.
[38] Mizugaki faced Aljamain Sterling on April 18, 2015, at UFC on Fox 15, replacing an injured Manvel Gamburyan.
Mizugaki was expected to face Guangyou Ning at Rebel FC 9 on September 7, 2018, but the event was eventually cancelled.
Mizugaki faced Shoji Maruyama at DEEP 89 Impact on May 12, 2019, winning the fight via unanimous decision.