[1] He advanced to the semifinals, held at Pancrase - Impressive Tour 5 on June 5, 2011, where he faced Yuki Yasunaga.
[2] Kitakata fought Shohei Takamatsu at Pancrase - Impressive Tour 12 on November 27, 2011, in his final fight of the year.
Kitakata faced Seiji Ozuka at Pancrase Progress Tour 13 on November 25, 2012, in his fifth and final fight of the year.
[12] Kitakata's winless streak extended to four consecutive fights after he lost to Yuki Yasunaga by split decision at Pancrase 258 on May 11, 2014.
Kitakata snapped his winless streak at Pancrase Osaka on July 20, 2014, after beating Kohei Haruka by unanimous decision.
He finished the year with a split decision loss to Hiroyuki Abe at Pancrase Osaka on December 21, 2014.
[22] Kitakata faced the reigning Shooto flyweight champion Yosuke Saruta at ONE Championship: Century Part Two on October 13, 2019.
[23] Saruta won the fight by a second-round technical knockout, stopping Kitakata with ground and pound at the 0:59 minute mark.
[29] He began treatment and rehabilitation immediately after the diagnosis, and was expected to face Yusaku Nakamura at Rizin 29 – Osaka on June 27, 2021.
[30] Three months later, on September 29, 2021, it was announced that Kitakata would make his first title defense against the #1 ranked Pancrase strawweight contender Yuta Miyazawa.
Kitakata's first title defense was scheduled for Pancrase 325 on December 11, 2021, two years and five months after he had won the belt.
Kitakata dropped Miyazawa with a left hook, which he followed up with ground and pound which forced referee Kosuke Umeda to wave the fight off.
[35] On April 1, 2023 at Rizin 41 – Osaka, Kitakata faced Makoto Takahashi and was chocked out via second round arm-triangle choke.