He is a former Flyweight King Of Pancrase,[3] where he holds the joint record for consecutive title defenses (6).
[4] Kiyotaka Shimizu was born in Ishibashi and attended the Sakushin Gakuin High School.
[5] He would begin his career as an amateur kickboxer, participating in the 2007 KAMINARIMON CLIMAX tournament, fighting in the 121 lbs weight class.
[8] He would fight Sunabe for the third time and beat him through a majority decision, as well as defending against Seiji Ozuka.
On December 1, 2012, Shimizu successfully defended the Super Flyweight King of Pancrase title against top contender Yuki Yasunaga of the 3rd round via KO at main event of year end "Progress Tour",[9] and would defend for the sixth time against Atsushi Yamamoto.
During Pancrase 273 he faced Ryuichi Miki in a flyweight Championship assessment bout, and lost a unanimous decision.
[18] Shimizu faced the undefeated Wataru Yamauchi at Shooto 2022 Vol.7 on November 27, 2022, in his retirement bout.