Tomoyuki Oka
Acting
Born 1991-06-12
Maebashi, Gunma Prefecture, Japan
320 credits
Read 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. A former NJPW World Television Champion and final official King of Pro Wrestling Champion, he is also a four-time IWGP Tag Team Champion with Jeff Cobb (2x), Aaron Henare, and Callum Newman. In 2026, he won the NEVER Openweight 6-Man Tag Team Championship alongside Henare and Will Ospreay. In recognition of his in-ring ability, he received Tokyo Sports’ Technique Award in 2021, Fighting Spirit Award in 2022, and Best Tag Team Award in 2022 alongside United Empre stablemate Jeff Cobb.
Oka began training with NJPW in 2015 and debuted in 2016 as part of the company’s Young Lion system before heading to the United Kingdom for an excursion with Revolution Pro Wrestling (RevPro), where he reinvented himself as Great-O-Khan and later captured the Undisputed British Heavyweight Championship. He returned to NJPW in 2020 as the first major member of Will Ospreay’s United Empire faction and quickly became one of the promotion’s most distinctive heavyweights, blending amateur wrestling, submission grappling, and his eccentric imperial persona. Known for his unconventional matches and crowd interaction, O-Khan gained further momentum in 2024 after reaching the G1 Climax playoffs and unsuccessfully challenging Tetsuya Naito for the IWGP World Heavyweight Championship. In 2025, he was ranked No. 137 in the Pro Wrestling Illustrated PWI 500.
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Filmography
— top 60 of 320
All Elite Wrestling: Dynamite
Stardom on Stardom World
NJPW New Japan Cup
NJPW Road to The New Beginning 2026 - Day 6
NJPW Yuji Nagata Produce Blue Justice XVII ~ Aoyi Transition ~
NJPW World Tag League 2025 - Day 16
NJPW World Tag League 2025 - Day 15
NJPW The New Beginning In Osaka 2026
NJPW Road to The New Beginning 2026 - Day 5
NJPW Road to The New Beginning 2026 - Day 7
NJPW Road to The New Beginning 2026 - Day 8
NJPW Road to Wrestling Dontaku 2026 - Day 2
NJPW Road to The New Beginning 2026 - Day 10
NJPW New Japan Cup 2025 - Day 1
NJPW New Japan Road in Karatsu 2026 ~ Ignition to Dominion
NJPW Road to Wrestling Dontaku 2026 - Day 3
NJPW Road to The New Beginning 2026 - Day 1
NJPW G1 Climax 36 - Day 11
NJPW Best of the Super Junior 33 - Day 14 (Final)
NJPW Road to Wrestling Dontaku 2026 - Day 5
NJPW G1 Climax 36 - Day 15
NJPW G1 Climax 36 - Day 12
NJPW World Tag League 2025 - Day 17 (Final)
NJPW Road to Wrestling Dontaku 2026 - Day 8
NJPW Road to The New Beginning 2026 - Day 9
NJPW Road to Tokyo Dome 2025 - Day 1
NJPW G1 Climax 36 - Day 10
NJPW Road to Wrestling Dontaku 2026 - Day 4
NJPW G1 Climax 36 - Day 14
NJPW New Japan Cup 2025 - Day 6
NJPW Road to Wrestling Dontaku 2026 - Day 1
NJPW Wrestle Grand Slam in MetLife Dome: Night 2
NJPW World Tag League 2025 - Day 1
NJPW New Japan Cup 2026 - Day 9
NJPW New Japan Cup 2026 - Day 10
NJPW Sakura Genesis 2026
NJPW G1 Climax 36 - Day 13
NJPW New Japan Cup 2026 - Day 1
NJPW New Japan Cup 2025 - Day 7
NJPW Road to Tokyo Dome 2025 - Day 3
NJPW Wrestling Dontaku 2018 - Night 1
NJPW G1 Climax 36 - Day 4
NJPW Road to G1 Climax 36 - Day 5
NJPW New Japan Cup 2021 - Day 13 (Final)
NJPW Road to Wrestling Dontaku 2026 - Day 7
NJPW Battle Autumn 2022 - Day 16
NJPW G1 Climax 36 - Day 5
NJPW World Tag League 2025 - Day 14
NJPW Road to The New Beginning 2026 - Day 3
NJPW New Japan Cup 2026 - Day 4
NJPW Road to Sakura Genesis 2023 - Day 2
NJPW New Japan Cup 2025 - Day 5
NJPW New Japan Cup 2026 - Day 7
NJPW New Japan Cup 2021 - Day 9
NJPW Road to The New Beginning 2026 - Day 4
NJPW Road to G1 Climax 36 - Day 4
NJPW Dominion 6.11 in Osaka-jo Hall
NJPW New Japan Cup 2026 - Day 12 (Final)
NJPW G1 Climax 36 - Day 2
NJPW G1 Climax 36 - Day 16
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