Tomoyuki Oka
Acting · Born Jun 12, 1991 · Maebashi, Gunma Prefecture, Japan
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
Films
NJPW King of Pro-Wrestling 2026
20269.0
NJPW Road to King of Pro-Wrestling 2026 - Day 4
2026
NJPW Road to King of Pro-Wrestling 2026 - Day 3
2026
NJPW Road to King of Pro-Wrestling 2026 - Day 2
20266.0
NJPW Road to King of Pro-Wrestling 2026 - Day 1
20269.0
NJPW Destruction In Kobe 2026
20267.0
NJPW Road to Destruction 2026 - Day 11
20267.0
NJPW Road to Destruction 2026 - Day 9
20265.0
NJPW Road to Destruction 2026 - Day 8
20268.0
NJPW Road to Destruction 2026 - Day 7
2026
NJPW Road to Destruction 2026 - Day 6
2026
NJPW Road to Destruction 2026 - Day 5
2026
NJPW Road to Destruction 2026 - Day 4
20265.0
NJPW Road to Destruction 2026 - Day 3
20268.0
NJPW Road to Destruction 2026 - Day 2
20266.0
NJPW Yuji Nagata Produce Blue Justice XIX ~Aogi Futotsu~
20266.0
NJPW Road to Destruction 2026 - Day 1
2026
NJPW G1 Climax 36 - Day 19 (Final)
20269.5
NJPW G1 Climax 36 - Day 18
20268.0
NJPW G1 Climax 36 - Day 17
20269.0
NJPW G1 Climax 36 - Day 16
20267.0
NJPW G1 Climax 36 - Day 15
20268.0
NJPW G1 Climax 36 - Day 14
20267.5
NJPW G1 Climax 36 - Day 13
20266.0
NJPW G1 Climax 36 - Day 12
20268.5
NJPW G1 Climax 36 - Day 11
20267.5
NJPW G1 Climax 36 - Day 10
20269.0
NJPW G1 Climax 36 - Day 9
20267.5
NJPW G1 Climax 36 - Day 8
20268.0
NJPW G1 Climax 36 - Day 7
20268.0
NJPW G1 Climax 36 - Day 6
20268.0
NJPW G1 Climax 36 - Day 5
20268.0
NJPW G1 Climax 36 - Day 4
20268.5
NJPW G1 Climax 36 - Day 3
20268.0
NJPW G1 Climax 36 - Day 2
20268.0
NJPW G1 Climax 36 - Day 1
20269.0
NJPW Tiger Mask's Retirement Match
20267.0
NJPW Road to G1 Climax 36 - Day 5
2026
NJPW Road to G1 Climax 36 - Day 4
2026
NJPW Road to G1 Climax 36 - Day 3
20268.5
NJPW Road to G1 Climax 36 - Day 2
2026
NJPW Yuji Nagata Produce Blue Justice XVIII
20268.0
NJPW Road to G1 Climax 36 - Day 1
2026
NJPW Dominion 6.14 In Osaka-Jo Hall 2026
20268.0
NJPW Best of the Super Junior 33 - Day 14 (Final)
20268.0
NJPW New Japan Road in Karatsu 2026 ~ Ignition to Dominion
2026
NJPW Wrestling Dontaku 2026 - Day 2
20268.0
NJPW Wrestling Dontaku 2026 - Day 1
20267.0
NJPW Road to Wrestling Dontaku 2026 - Day 8
2026
NJPW Road to Wrestling Dontaku 2026 - Day 7
2026
NJPW Road to Wrestling Dontaku 2026 - Day 6
2026
NJPW Road to Wrestling Dontaku 2026 - Day 5
2026
NJPW Road to Wrestling Dontaku 2026 - Day 4
2026
NJPW Road to Wrestling Dontaku 2026 - Day 3
2026
NJPW Road to Wrestling Dontaku 2026 - Day 2
2026
NJPW Road to Wrestling Dontaku 2026 - Day 1
20265.0
NJPW Sakura Genesis 2026
20268.5
NJPW New Japan Cup 2026 - Day 12 (Final)
20267.0
NJPW New Japan Cup 2026 - Day 10
20266.0
NJPW New Japan Cup 2026 - Day 9
20267.0
NJPW New Japan Cup 2026 - Day 8
20267.0
NJPW New Japan Cup 2026 - Day 7
20267.0
NJPW New Japan Cup 2026 - Day 5
2026
NJPW New Japan Cup 2026 - Day 4
20264.0
NJPW 54th Anniversary Event & New Japan Cup 2026 - Day 3
20265.0
NJPW New Japan Cup 2026 - Day 1
20267.0
NJPW The New Beginning In Osaka 2026
20268.0
NJPW Road to The New Beginning 2026 - Day 10
20266.0
NJPW Road to The New Beginning 2026 - Day 9
2026
NJPW Road to The New Beginning 2026 - Day 8
2026
NJPW Road to The New Beginning 2026 - Day 7
2026
NJPW Road to The New Beginning 2026 - Day 6
20267.0
NJPW Road to The New Beginning 2026 - Day 5
2026
NJPW Road to The New Beginning 2026 - Day 4
2026
NJPW Road to The New Beginning 2026 - Day 3
2026
NJPW Road to The New Beginning 2026 - Day 2
20265.0
NJPW Road to The New Beginning 2026 - Day 1
20266.0
NJPW Yuji Nagata Produce Blue Justice XVII ~ Aoyi Transition ~
20264.0
NJPW New Year Dash !! 2026
20267.0
NJPW Wrestle Kingdom 20
20268.0
NJPW Road to Tokyo Dome 2025 - Day 3
2025
NJPW Road to Tokyo Dome 2025 - Day 2
2025
NJPW Road to Tokyo Dome 2025 - Day 1
2025
NJPW World Tag League 2025 - Day 17 (Final)
2025
NJPW World Tag League 2025 - Day 16
2025
NJPW World Tag League 2025 - Day 15
2025
NJPW World Tag League 2025 - Day 14
2025
NJPW World Tag League 2025 - Day 13
2025
NJPW World Tag League 2025 - Day 12
2025
NJPW World Tag League 2025 - Day 11
2025
NJPW World Tag League 2025 - Day 10
2025
NJPW World Tag League 2025 - Day 9
2025
NJPW World Tag League 2025 - Day 8
2025
NJPW World Tag League 2025 - Day 7
2025
NJPW World Tag League 2025 - Day 6
2025
NJPW World Tag League 2025 - Day 5
2025
NJPW World Tag League 2025 - Day 4
2025
NJPW World Tag League 2025 - Day 3
2025
NJPW World Tag League 2025 - Day 2
2025
NJPW World Tag League 2025 - Day 1
2025
NJPW New Japan Road in Anjo 2025
2025
NJPW Hiroshi Tanahashi ~ Final Homecoming
2025
NJPW Destruction In Kobe 2025
2025
NJPW G1 Climax 35: Day 19 (Final)
2025
NJPW G1 Climax 35: Day 18
2025
NJPW G1 Climax 35: Day 17
2025
NJPW G1 Climax 35: Day 16
2025
NJPW G1 Climax 35: Day 15
2025
NJPW G1 Climax 35: Day 12
2025
NJPW G1 Climax 35: Day 11
2025
NJPW G1 Climax 35: Day 10
2025
NJPW G1 Climax 35: Day 9
2025
NJPW G1 Climax 35: Day 8
2025
NJPW G1 Climax 35: Day 7
2025
NJPW G1 Climax 35: Day 6
2025
NJPW G1 Climax 35: Day 5
2025
NJPW G1 Climax 35: Day 4
2025
NJPW G1 Climax 35: Day 3
2025
NJPW G1 Climax 35: Day 2
2025
NJPW G1 Climax 35: Day 1
2025
NJPW New Japan Soul 2025 - Day 8
202510.0
NJPW Tanahashi Jam
20257.0
NJPW Dominion 6.15 In Osaka-Jo Hall 2025
2025
NJPW Wrestling Dontaku 2025 - Night 2
2025
NJPW Wrestling Dontaku 2025 - Night 1
2025
NJPW Wrestling Redzone in Hiroshima
2025
NJPW Sakura Genesis 2025
2025
NJPW New Japan Cup 2025 - Day 8
2025
NJPW New Japan Cup 2025 - Day 7
2025
NJPW New Japan Cup 2025 - Day 6
2025
NJPW New Japan Cup 2025 - Day 5
2025
NJPW New Japan Cup 2025 - Day 4
2025
NJPW New Japan Cup 2025 - Day 3
2025
NJPW New Japan Cup 2025 - Day 2
2025
NJPW New Japan Cup 2025 - Day 1
2025
NJPW The New Beginning In Osaka 2025
20256.0
NJPW Blue Justice XV - Wrestling Life 40th Anniversary Yuji Nagata
20256.0
NJPW New Year Dash!! 2025
2025
NJPW x AEW x CMLL x ROH x STARDOM: Wrestle Dynasty
20257.0
NJPW Wrestle Kingdom 19
20258.0
NJPW x STARDOM: Historic X-Over II
20247.0
NJPW Power Struggle ~ Super Junior Tag League 2024
2024
NJPW Destruction in Kobe 2024
2024
NJPW Road to Destruction 2024: Day 5
2024
NJPW Road to Destruction 2024: Day 4
2024
NJPW Road to Destruction 2024: Day 3
2024
NJPW Road to Destruction 2024: Day 2
2024
NJPW Shingo Takagi's 20th Debut Anniversary Event
2024
NJPW G1 Climax 34: Day 19 (Final)
2024
NJPW G1 Climax 34: Day 18
2024
NJPW G1 Climax 34: Day 17
2024
NJPW G1 Climax 34: Day 16
2024
NJPW G1 Climax 34: Day 15
2024
NJPW G1 Climax 34: Day 14
2024
NJPW G1 Climax 34: Day 13
2024
NJPW G1 Climax 34: Day 12
20245.5
NJPW G1 Climax 34: Day 11
2024
NJPW G1 Climax 34: Day 10
2024
NJPW G1 Climax 34: Day 9
2024
NJPW G1 Climax 34: Day 8
2024
NJPW G1 Climax 34: Day 7
2024
NJPW G1 Climax 34: Day 6
2024
NJPW G1 Climax 34: Day 5
2024
NJPW G1 Climax 34: Day 4
2024
NJPW G1 Climax 34: Day 3
2024
NJPW G1 Climax 34: Day 2
2024
NJPW G1 Climax 34: Day 1
2024
NJPW New Japan Soul 2024: Day 7
2024
NJPW New Japan Soul 2024: Day 5
2024
NJPW New Japan Soul 2024: Day 4
2024
NJPW New Japan Soul 2024: Day 3
2024
NJPW New Japan Soul 2024: Day 2
2024
NJPW New Japan Soul 2024: Day 1
2024
NJPW Dominion 6.9 In Osaka-Jo Hall ~ Best of the Super Junior 31 Final ~ 2024
2024
NJPW Wrestling Dontaku 2024 - Night 2
2024
NJPW Wrestling Dontaku 2024 - Night 1
2024
NJPW Sakura Genesis 2024
20247.0
NJPW New Japan Cup 2024 - Day 2
2024
NJPW 52nd Anniversary Event & New Japan Cup 2024 - Day 1
2024
NJPW The New Beginning In Sapporo 2024 - Day 2
2024
NJPW The New Beginning In Sapporo 2024 - Day 1
2024
NJPW The New Beginning in Osaka 2024
2024
NJPW The New Beginning in Nagoya
2024
NJPW New Year Dash!! 2024
2024
NJPW Power Struggle ~ Super Junior Tag League 2023
202310.0
NJPW Royal Quest III
2023
NJPW Destruction In Ryogoku 2023
2023
NJPW Destruction In Kobe 2023
2023
NJPW G1 Climax 33: Day 19 (Final)
2023
NJPW G1 Climax 33: Day 18
2023
NJPW G1 Climax 33: Day 17
20237.3
NJPW G1 Climax 33: Day 16
20237.4
NJPW G1 Climax 33: Day 15
2023
NJPW G1 Climax 33: Day 14
2023
NJPW G1 Climax 33: Day 13
20238.5
NJPW G1 Climax 33: Day 11
20238.5
NJPW G1 Climax 33: Day 9
2023
NJPW G1 Climax 33: Day 7
2023
NJPW G1 Climax 33: Day 5
2023
NJPW G1 Climax 33: Day 3
2023
NJPW G1 Climax 33: Day 1
20239.0
RevPro Epic Encounter 2023
2023
NJPW Dominion 6.4 in Osaka-jo Hall 2023
2023
NJPW Wrestling Dontaku 2023
2023
NJPW Sakura Genesis 2023
2023
NJPW Road to Sakura Genesis 2023 - Day 2
2023
NJPW New Japan Cup 2023: Day 4
2023
NJPW New Japan Cup 2023: Day 3
2023
NJPW 51st Anniversary Event & New Japan Cup 2023: Day 2
2023
NJPW The New Beginning in Osaka 2023
2023
NJPW The New Beginning In Sapporo 2023 - Day 2
2023
NJPW The New Beginning In Sapporo 2023 - Day 1
2023
NJPW New Year Dash !! 2023
2023
NJPW Wrestle Kingdom 17: Night 1 in Tokyo Dome
20237.0
NJPW Wrestle Kingdom 17 Pre-Show
2023
RevPro Uprising 2022
2022
NJPW x STARDOM: Historic X-Over
20228.0
NJPW Battle Autumn 2022 - Day 16
2022
NJPW Declaration of Power
2022
NJPW Royal Quest II - Night 2
2022
NJPW Burning Spirit 2022 - Day 14
2022
NJPW G1 Climax 32: Day 20 (Final)
2022
NJPW G1 Climax 32: Day 17
2022
NJPW G1 Climax 32: Day 15
2022
NJPW G1 Climax 32: Day 14
2022
NJPW G1 Climax 32: Day 13
2022
NJPW G1 Climax 32: Day 12
2022
NJPW G1 Climax 32: Day 11
2022
NJPW G1 Climax 32: Day 10
2022
NJPW G1 Climax 32: Day 9
2022
NJPW G1 Climax 32: Day 8
2022
NJPW G1 Climax 32: Day 7
2022
NJPW G1 Climax 32: Day 6
2022
NJPW G1 Climax 32: Day 5
2022
NJPW G1 Climax 32: Day 4
2022
NJPW G1 Climax 32: Day 3
2022
NJPW G1 Climax 32: Day 2
2022
NJPW G1 Climax 32: Day 1
2022
AEW x NJPW Presents Forbidden Door 2022
20228.9
NJPW Dominion 6.12 In Osaka-Jo Hall 2022
20229.0
NJPW Capital Collision 2022
2022
NJPW Wrestling Dontaku 2022
20228.0
NJPW Windy City Riot 2022
2022
NJPW New Japan Cup 2022 - Day 15 (Final)
2022
NJPW New Japan Cup 2022 - Day 14
2022
NJPW New Japan Cup 2022 - Day 13
2022
NJPW New Japan Cup 2022 - Day 12
2022
NJPW New Japan Cup 2022 - Day 10
2022
NJPW New Japan Cup 2022 - Day 9
2022
NJPW New Japan Cup 2022 - Day 8
2022
NJPW New Japan Cup 2022 - Day 7
2022
NJPW New Japan Cup 2022 - Day 6
2022
NJPW New Japan Cup 2022 - Day 5
2022
NJPW New Japan Cup 2022 - Day 4
2022
NJPW New Japan Cup 2022 - Day 3
2022
NJPW New Japan Cup 2022 - Day 2
2022
NJPW New Years Golden Series 2022 - Day 14
2022
NJPW New Years Golden Series 2022 - Day 10
2022
NJPW New Years Golden Series 2022 - Day 9
2022
NJPW New Years Golden Series 2022 - Day 6
2022
NJPW New Years Golden Series 2022 - Day 2
2022
NJPW New Years Golden Series 2022 - Day 1
2022
NJPW Wrestle Kingdom 16: Night 2
2022
NJPW Wrestle Kingdom 16: Night 1
2022
NJPW Power Struggle 2021
2021
NJPW G1 Climax 31: Day 19 (Final)
2021
NJPW G1 Climax 31: Day 17
2021
NJPW G1 Climax 31: Day 15
2021
NJPW G1 Climax 31: Day 13
2021
NJPW G1 Climax 31: Day 11
2021
NJPW G1 Climax 31: Day 9
2021
NJPW G1 Climax 31: Day 7
2021
NJPW G1 Climax 31: Day 5
2021
NJPW G1 Climax 31: Day 3
2021
NJPW G1 Climax 31: Day 1
2021
NJPW Wrestle Grand Slam in MetLife Dome: Night 2
2021
NJPW Wrestle Grand Slam in MetLife Dome: Night 1
2021
NJPW Wrestle Grand Slam In Tokyo Dome
2021
NJPW Wrestling Dontaku 2021 - Night 2
20217.0
NJPW Wrestling Dontaku 2021 - Night 1
20217.0
NJPW Sakura Genesis 2021
2021
NJPW New Japan Cup 2021 - Day 13 (Final)
2021
NJPW New Japan Cup 2021 - Day 12
2021
NJPW New Japan Cup 2021 - Day 11
2021
NJPW New Japan Cup 2021 - Day 9
2021
NJPW New Japan Cup 2021 - Day 7
2021
NJPW New Japan Cup 2021 - Day 6
2021
NJPW New Japan Cup 2021 - Day 5
2021
NJPW New Japan Cup 2021 - Day 4
2021
NJPW New Japan Cup 2021 - Day 3
2021
NJPW New Japan Cup 2021 - Day 2
2021
NJPW New Japan Cup 2021 - Day 1
2021
NJPW 49th Anniversary Show
2021
NJPW Castle Attack 2021 - Day 2
2021
NJPW Castle Attack 2021 - Day 1
2021
NJPW The New Beginning in Nagoya
2021
NJPW New Year Dash !! 2021
2021
NJPW Wrestle Kingdom 15: Night 1
20218.7
NJPW G1 Climax 30: Day 19 (Final)
2020
RevPro High Stakes 2020
2020
RevPro Uprising 2019
2019
RevPro Uprising 2018
2018
RevPro & NJPW: Global Wars 2018
2018
My Dad Is a Heel Wrestler
20186.5
NJPW Best of the Super Junior 25 - Day 1
2018
NJPW Wrestling Dontaku 2018 - Night 2
2018
NJPW Wrestling Dontaku 2018 - Night 1
2018
NJPW New Japan Cup 2018 - Day 4
2018
NJPW New Japan Cup 2018 - Day 3
2018
NJPW New Japan Cup 2018 - Day 2
2018
NJPW New Japan Cup 2018 - Day 1
2018
NJPW 46th Anniversary Show
2018
NJPW The New Beginning In Sapporo 2018 - Day 2
2018
NJPW New Year Dash !! 2018
20187.0
NJPW Destruction in Kobe 2017
2017
NJPW G1 Climax 27: Day 17
2017
NJPW G1 Climax 27: Day 16
2017
NJPW G1 Climax 27: Day 15
2017
NJPW G1 Climax 27: Day 14
2017
NJPW G1 Climax 27: Day 13
2017
NJPW G1 Climax 27: Day 12
2017
NJPW G1 Climax 27: Day 10
2017
NJPW G1 Climax 27: Day 9
2017
NJPW G1 Climax 27: Day 8
2017
NJPW G1 Climax 27: Day 6
2017
NJPW G1 Climax 27: Day 4
2017
NJPW Dominion 6.11 in Osaka-jo Hall 2017
20179.7
NJPW Wrestling Dontaku 2017
20177.0
NJPW Wrestling Toyonokuni 2017
2017
NJPW Sakura Genesis 2017
201710.0
NJPW New Japan Cup 2017 - Day 1
2017
NJPW 45th Anniversary Show
2017
NJPW The New Beginning In Sapporo 2017
2017
