Koji Oishi: MMA Career and Key Results

Koji Oishi is a Japanese mixed martial artist who competed across Pancrase, the UFC, and ONE Championship. A long-time lightweight, he reached the top of ONE’s featherweight division in 2013, then made his final title defense the following year.

Early international bouts

Oishi fought in Pancrase from the early 2000s and later appeared in the UFC. At UFC 53 in 2005, Nick Diaz stopped him in the first round. Oishi then beat Diaz’s brother Nate by unanimous decision at Pancrase 152. UFC’s retrospective on Japanese fighters notes Oishi’s Pancrase wins over Nate Diaz and Chris Lytle, while the official UFC profile preserves his Octagon history.

ONE Championship title run

Oishi’s best-known achievement came in 2013, when he defeated Honorio Banario by second-round TKO at ONE: Rise to Power to win the ONE featherweight title. He faced Banario again later that year at ONE: Moment of Truth, winning by third-round TKO. Oishi’s title reign ended in August 2014, when he defended his championship against Narantungalag Jadambaa at ONE: Reign of Champions and lost by unanimous decision. That bout is listed as his last professional MMA fight.

Oishi’s path from Pancrase to the UFC and ONE Championship reflects the international reach of modern MMA. His run also brought him into the records of several well-known fighters from different eras and promotions.

Selected Recorded Results

• Aug 29, 2014: Koji Oishi lost to Narantungalag Jadambaa at One FC 19 – Reign of Champions; Decision (Unanimous), round 5, 5:00.
• Dec 6, 2013: Koji Oishi won against Honorio Banario at One FC 13 – Moment of Truth; KO (Punches), round 3, 1:43.
• May 31, 2013: Koji Oishi won against Honorio Banario at One FC 9 – Rise to Power; KO (Punches), round 2, 1:45.
• Mar 17, 2013: Koji Oishi drew with Takumi Nakayama at Pancrase – 246; Draw (Majority), round 3, 5:00.
• Dec 1, 2012: Koji Oishi won against Jon Shores at Pancrase – Progress Tour 14; Decision (Unanimous), round 3, 5:00.

Sources

UFC: athlete profile; UFC.

Article Tags

Koji Oishi, Mixed Martial Arts, Sports History