
Tomoyuki Oka
- Date of Birth: 1991-06-12
- Place of Birth: Maebashi, Gunma Prefecture, Japan
Biography
Tomoyuki Oka, better known by his ring name Great-O-Khan, is a Japanese professional wrestler signed to New Japan Pro-Wrestling (NJPW), where he is a member of the United Empire stable. He also wrestl... Tomoyuki Oka, better known by his ring name Great-O-Khan, is a Japanese professional wrestler signed to New Japan Pro-Wrestling (NJPW), where he is a member of the United Empire stable. He also wrestles for NJPW's United Kingdom based partner promotion Revolution Pro Wrestling (RevPro), where he is the former Undisputed British Heavyweight Champion. In NJPW, he is a two-time IWGP Tag Team Champion (with Jeff Cobb).

All Elite Wrestling: Dynamite
Action & Adventure, Drama • 2019 October

NJPW Wrestle Kingdom 19
• 2025 January

NJPW Wrestling Dontaku
Action • 2022 May

NJPW G1 Climax 33: Day 16
• 2023 August

My Dad Is a Heel Wrestler
Family, Drama • 2018 September

NJPW G1 Climax 33: Day 17
• 2023 August

NJPW Wrestle Kingdom 17: Night 1 in Tokyo Dome
Action • 2023 January

NJPW Wrestling Dontaku 2017
Action • 2017 May

NJPW x AEW x CMLL x ROH x STARDOM: Wrestle Dynasty
• 2025 January

NJPW New Year Dash !! 2018
Action • 2018 January