
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).

NJPW The New Beginning in Nagoya
• 2021 January

NJPW G1 Climax 32: Day 20 (Final)
• 2022 August

NJPW: King Of Pro Wrestling 2024
Action • 2024 October

NJPW G1 Climax 31: Day 9
• 2021 October

NJPW: The New Beginning in Osaka 2023
• 2023 February

NJPW G1 Climax 34: Day 7
• 2024 July

NJPW New Japan Cup 2024 • Day 2
• 2024 March

NJPW Destruction In Kobe 2023
• 2023 September

NJPW Wrestling Dontaku 2025 - Night 2
• 2025 May

NJPW G1 Climax 34: Day 1
• 2024 July