Known For
Acting
Born
Jun 12, 1991
Place of Birth
Maebashi, Gunma Prefecture, Japan
Credits
320 titles
Tomoyuki Oka
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.
Known For
Filmography
NJPW G1 Climax 36 - Day 16
Great-O-Khan
NJPW G1 Climax 36 - Day 15
Great-O-Khan
NJPW G1 Climax 36 - Day 14
Great-O-Khan
NJPW G1 Climax 36 - Day 13
Great-O-Khan
NJPW G1 Climax 36 - Day 12
Great-O-Khan
NJPW G1 Climax 36 - Day 11
Great-O-Khan
NJPW G1 Climax 36 - Day 10
Great-O-Khan
NJPW G1 Climax 36 - Day 9
Great-O-Khan
NJPW G1 Climax 36 - Day 8
Great-O-Khan
NJPW G1 Climax 36 - Day 7
Great-O-Khan
NJPW G1 Climax 36 - Day 6
Great-O-Khan
NJPW G1 Climax 36 - Day 5
Great-O-Khan
NJPW G1 Climax 36 - Day 4
Great-O-Khan
NJPW G1 Climax 36 - Day 3
Great-O-Khan
NJPW G1 Climax 36 - Day 2
Great-O-Khan
NJPW G1 Climax 36 - Day 1
Great-O-Khan
NJPW Tiger Mask's Retirement Match
Great-O-Khan
NJPW Road to G1 Climax 36 - Day 5
Great-O-Khan
NJPW Road to G1 Climax 36 - Day 4
Great-O-Khan
NJPW Road to G1 Climax 36 - Day 3
Great-O-Khan
NJPW Road to G1 Climax 36 - Day 2
Great-O-Khan
NJPW Yuji Nagata Produce Blue Justice XVIII
Great-O-Khan
NJPW Road to G1 Climax 36 - Day 1
Great-O-Khan
NJPW Dominion 6.14 In Osaka-Jo Hall
Great-O-Khan
NJPW Best of the Super Junior 33 - Day 14 (Final)
Great-O-Khan
NJPW New Japan Road in Karatsu 2026 ~ Ignition to Dominion
Great-O-Khan
NJPW Wrestling Dontaku 2026 - Day 2
Great-O-Khan
NJPW Wrestling Dontaku 2026 - Day 1
Great-O-Khan
NJPW Road to Wrestling Dontaku 2026 - Day 8
Great-O-Khan
NJPW Road to Wrestling Dontaku 2026 - Day 7
Great-O-Khan
NJPW Road to Wrestling Dontaku 2026 - Day 6
Great-O-Khan
NJPW Road to Wrestling Dontaku 2026 - Day 5
Great-O-Khan
NJPW Road to Wrestling Dontaku 2026 - Day 4
Great-O-Khan
NJPW Road to Wrestling Dontaku 2026 - Day 3
Great-O-Khan
NJPW Road to Wrestling Dontaku 2026 - Day 2
Great-O-Khan
NJPW Road to Wrestling Dontaku 2026 - Day 1
Great-O-Khan
NJPW Sakura Genesis 2026
Great-O-Khan
NJPW New Japan Cup 2026 - Day 12 (Final)
Great-O-Khan
NJPW New Japan Cup 2026 - Day 10
Great-O-Khan
NJPW New Japan Cup 2026 - Day 9
Great-O-Khan
NJPW New Japan Cup 2026 - Day 8
Great-O-Khan
NJPW New Japan Cup 2026 - Day 7
Great-O-Khan
NJPW New Japan Cup 2026 - Day 5
Great-O-Khan
NJPW New Japan Cup 2026 - Day 4
Great-O-Khan
NJPW 54th Anniversary Event & New Japan Cup 2026 - Day 3
Great-O-Khan
NJPW New Japan Cup 2026 - Day 1
Great-O-Khan
NJPW The New Beginning In Osaka 2026
Great-O-Khan
NJPW Road to The New Beginning 2026 - Day 10
Great-O-Khan
NJPW Road to The New Beginning 2026 - Day 9
Great-O-Khan
NJPW Road to The New Beginning 2026 - Day 8
Great-O-Khan