Tomoyuki Oka
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.
276 acting credits
Acting · 276
All Elite Wrestling: Dynamite
2019
Stardom on Stardom World
2011
NJPW New Japan Cup
2005
My Dad Is a Heel Wrestler
2018
NJPW Road to The New Beginning 2026 - Day 6
2026
NJPW The New Beginning In Osaka 2026
2026
NJPW Wrestling Dontaku 2024 - Night 1
2024
NJPW G1 Climax 33: Day 19 (Final)
2023
NJPW x STARDOM: Historic X-Over
2022
NJPW Destruction in Kobe 2017
2017
NJPW Wrestle Grand Slam in MetLife Dome: Night 2
2021
AEW x NJPW Presents Forbidden Door 2022
2022
NJPW G1 Climax 30: Day 19 (Final)
2020
NJPW 52nd Anniversary Event & New Japan Cup 2024 - Day 1
2024
NJPW Dominion 6.11 in Osaka-jo Hall
2017
NJPW 45th Anniversary Show
2017
NJPW x STARDOM: Historic X-Over II
2024
NJPW 51st Anniversary Event & New Japan Cup 2023: Day 2
2023
NJPW The New Beginning In Sapporo 2024 - Day 1
2024
NJPW The New Beginning In Sapporo 2024 - Day 2
2024
NJPW Wrestling Dontaku 2018 - Night 2
2018
NJPW The New Beginning in Osaka 2023
2023
NJPW The New Beginning In Osaka 2025
2025
NJPW G1 Climax 33: Day 18
2023
NJPW x AEW x CMLL x ROH x STARDOM: Wrestle Dynasty
2025
NJPW Wrestle Kingdom 17: Night 1 in Tokyo Dome
2023
NJPW Wrestling Dontaku 2024 - Night 2
2024
NJPW The New Beginning in Osaka 2024
2024
NJPW G1 Climax 34: Day 19 (Final)
2024
NJPW Wrestling Dontaku 2018 - Night 1
2018
NJPW Dominion 6.9 In Osaka-Jo Hall ~ Best of the Super Junior 31 Final ~
2024
NJPW Wrestle Kingdom 20
2026
NJPW Wrestle Grand Slam In Tokyo Dome
2021
NJPW New Japan Cup 2023: Day 3
2023
NJPW Castle Attack 2021 - Day 2
2021
NJPW G1 Climax 35: Day 16
2025
NJPW The New Beginning In Sapporo 2023 - Day 2
2023
NJPW New Japan Cup 2023: Day 4
2023
NJPW New Year Dash!! 2024
2024
NJPW New Year Dash !! 2018
2018
NJPW Wrestle Kingdom 15: Night 1
2021
NJPW G1 Climax 27: Day 4
2017
NJPW G1 Climax 32: Day 1
2022
NJPW Wrestling Dontaku 2022
2022
NJPW New Japan Cup 2026 - Day 1
2026
NJPW Power Struggle ~ Super Junior Tag League 2024
2024
NJPW Dominion 6.4 in Osaka-jo Hall
2023
NJPW Shingo Takagi's 20th Debut Anniversary Event
2024
NJPW Capital Collision 2022
2022
NJPW Wrestle Kingdom 17 Pre-Show
2023
NJPW G1 Climax 34: Day 6
2024
NJPW G1 Climax 34: Day 7
2024
NJPW Battle Autumn 2022 - Day 16
2022
NJPW The New Beginning In Sapporo 2018 - Day 2
2018
NJPW G1 Climax 34: Day 3
2024
NJPW Wrestle Kingdom 19
2025
NJPW G1 Climax 31: Day 17
2021
NJPW Castle Attack 2021 - Day 1
2021
NJPW G1 Climax 32: Day 6
2022
NJPW New Years Golden Series 2022 - Day 10
2022
NJPW G1 Climax 34: Day 5
2024
NJPW G1 Climax 34: Day 10
2024
NJPW G1 Climax 32: Day 3
2022
NJPW G1 Climax 32: Day 9
2022
NJPW Wrestling Dontaku 2025 - Night 1
2025
NJPW G1 Climax 34: Day 14
2024
NJPW Wrestle Kingdom 16: Night 2
2022
NJPW Wrestling Redzone in Hiroshima
2025
NJPW Wrestling Dontaku 2017
2017
NJPW Wrestling Dontaku 2025 - Night 2
2025
NJPW Windy City Riot 2022
2022
NJPW The New Beginning in Nagoya
2021
NJPW G1 Climax 33: Day 16
2023
NJPW The New Beginning In Sapporo 2023 - Day 1
2023
NJPW G1 Climax 34: Day 11
2024
NJPW New Japan Cup 2026 - Day 10
2026
NJPW G1 Climax 34: Day 15
2024
NJPW Road to Destruction 2024: Day 2
2024
NJPW New Japan Cup 2024 - Day 2
2024
NJPW World Tag League 2025 - Day 15
2025
NJPW Blue Justice XV - Wrestling Life 40th Anniversary Yuji Nagata
2025
NJPW New Japan Cup 2021 - Day 3
2021
NJPW Destruction In Kobe 2023
2023
NJPW World Tag League 2025 - Day 16
2025
NJPW Wrestle Kingdom 16: Night 1
2022
NJPW Road to Destruction 2024: Day 5
2024
NJPW Power Struggle 2021
2021
NJPW New Japan Soul 2024: Day 7
2024
NJPW G1 Climax 31: Day 11
2021
NJPW World Tag League 2025 - Day 2
2025
NJPW G1 Climax 27: Day 9
2017
NJPW Road to Destruction 2024: Day 3
2024
NJPW Wrestling Dontaku 2026 - Day 2
2026
NJPW Sakura Genesis 2025
2025
NJPW Dominion 6.15 In Osaka-Jo Hall
2025
NJPW Best of the Super Junior 25 - Day 1
2018
NJPW Wrestling Dontaku 2021 - Night 2
2021
NJPW New Japan Cup 2018 - Day 3
2018
NJPW Dominion 6.12 In Osaka-Jo Hall
2022
NJPW The New Beginning In Sapporo 2017
2017
NJPW G1 Climax 34: Day 12
2024
NJPW Road to Wrestling Dontaku 2026 - Day 2
2026
NJPW World Tag League 2025 - Day 17 (Final)
2025
NJPW New Year Dash !! 2021
2021
NJPW Power Struggle ~ Super Junior Tag League 2023
2023
NJPW G1 Climax 35: Day 12
2025
NJPW G1 Climax 33: Day 15
2023
NJPW Wrestling Dontaku 2021 - Night 1
2021
NJPW Sakura Genesis 2024
2024
NJPW New Japan Cup 2021 - Day 13 (Final)
2021
NJPW Sakura Genesis 2017
2017
NJPW New Year Dash !! 2023
2023
NJPW Declaration of Power
2022
NJPW Destruction in Kobe 2024
2024
NJPW G1 Climax 31: Day 19 (Final)
2021
NJPW G1 Climax 33: Day 13
2023
NJPW Wrestle Grand Slam in MetLife Dome: Night 1
2021
NJPW The New Beginning in Nagoya
2024
NJPW G1 Climax 34: Day 8
2024
NJPW New Japan Soul 2024: Day 3
2024
NJPW G1 Climax 35: Day 19 (Final)
2025
NJPW Road to The New Beginning 2026 - Day 3
2026
NJPW G1 Climax 33: Day 17
2023
NJPW G1 Climax 31: Day 13
2021
NJPW G1 Climax 35: Day 15
2025
NJPW G1 Climax 34: Day 17
2024
NJPW New Years Golden Series 2022 - Day 2
2022
NJPW Tanahashi Jam
2025
NJPW G1 Climax 27: Day 10
2017
NJPW Sakura Genesis 2023
2023
RevPro Uprising 2019
2019
NJPW G1 Climax 32: Day 20 (Final)
2022
NJPW G1 Climax 34: Day 13
2024
NJPW 49th Anniversary Show
2021
NJPW G1 Climax 34: Day 18
2024
NJPW Road to The New Beginning 2026 - Day 9
2026
NJPW 54th Anniversary Event & New Japan Cup 2026 - Day 3
2026
NJPW G1 Climax 32: Day 10
2022
RevPro British J Cup 2018 - Night 1
2018
NJPW Sakura Genesis 2021
2021
NJPW: Royal Quest II - Night 2
2022
NJPW Wrestling Dontaku 2026 - Day 1
2026
NJPW New Japan Soul 2024: Day 5
2024
NJPW Destruction In Ryogoku 2023
2023
NJPW Sakura Genesis 2026
2026
NJPW New Japan Soul 2024: Day 2
2024
NJPW G1 Climax 32: Day 12
2022
NJPW New Japan Cup 2021 - Day 6
2021
NJPW G1 Climax 34: Day 4
2024
NJPW New Years Golden Series 2022 - Day 1
2022
NJPW New Japan Cup 2021 - Day 2
2021
NJPW New Years Golden Series 2022 - Day 14
2022
NJPW G1 Climax 34: Day 1
2024
NJPW New Japan Cup 2021 - Day 5
2021
NJPW New Year Dash!! 2025
2025
NJPW Road to Tokyo Dome 2025 - Day 2
2025
NJPW G1 Climax 32: Day 8
2022
NJPW G1 Climax 31: Day 15
2021
NJPW G1 Climax 31: Day 3
2021
NJPW New Japan Soul 2025 - Day 8
2025
NJPW Road to The New Beginning 2026 - Day 7
2026
NJPW World Tag League 2025 - Day 1
2025
NJPW Road to Wrestling Dontaku 2026 - Day 3
2026
NJPW G1 Climax 33: Day 7
2023
NJPW G1 Climax 32: Day 15
2022
NJPW G1 Climax 31: Day 9
2021
NJPW New Japan Cup 2021 - Day 1
2021
NJPW New Japan Cup 2018 - Day 2
2018
NJPW Road to Wrestling Dontaku 2026 - Day 1
2026
NJPW New Japan Soul 2024: Day 1
2024
NJPW G1 Climax 32: Day 11
2022
NJPW Yuji Nagata Produce Blue Justice XVII ~ Aoyi Transition ~
2026
NJPW Road to Destruction 2024: Day 4
2024
NJPW Road to Sakura Genesis 2023 - Day 2
2023
NJPW G1 Climax 32: Day 13
2022
NJPW Destruction In Kobe 2025
2025
NJPW New Years Golden Series 2022 - Day 9
2022
NJPW G1 Climax 27: Day 8
2017
NJPW G1 Climax 33: Day 14
2023
NJPW G1 Climax 32: Day 17
2022
NJPW New Japan Cup 2026 - Day 5
2026
NJPW Road to The New Beginning 2026 - Day 1
2026
NJPW New Japan Cup 2025 - Day 2
2025
NJPW G1 Climax 27: Day 17
2017
NJPW G1 Climax 35: Day 3
2025
NJPW G1 Climax 32: Day 5
2022
NJPW New Japan Soul 2024: Day 4
2024
NJPW New Year Dash !! 2026
2026
NJPW Burning Spirit 2022 - Day 14
2022
NJPW G1 Climax 32: Day 2
2022
NJPW G1 Climax 27: Day 16
2017
NJPW G1 Climax 33: Day 5
2023
NJPW Road to The New Beginning 2026 - Day 5
2026
NJPW Dominion 6.14 In Osaka-Jo Hall
2026
NJPW World Tag League 2025 - Day 14
2025
NJPW New Japan Road in Anjo 2025
2025
RevPro High Stakes 2020
2020
NJPW G1 Climax 31: Day 7
2021
NJPW G1 Climax 32: Day 4
2022
NJPW New Japan Cup 2026 - Day 9
2026
NJPW New Japan Cup 2026 - Day 12 (Final)
2026
NJPW New Japan Cup 2025 - Day 1
2025
NJPW G1 Climax 35: Day 18
2025
NJPW G1 Climax 35: Day 7
2025
NJPW New Japan Road in Karatsu 2026 ~ Ignition to Dominion
2026
NJPW G1 Climax 31: Day 5
2021
NJPW G1 Climax 34: Day 16
2024
NJPW Wrestling Dontaku 2023
2023
NJPW World Tag League 2025 - Day 13
2025
NJPW G1 Climax 32: Day 14
2022
NJPW World Tag League 2025 - Day 3
2025
NJPW G1 Climax 27: Day 14
2017
NJPW G1 Climax 34: Day 9
2024
NJPW World Tag League 2025 - Day 12
2025
NJPW G1 Climax 33: Day 9
2023
NJPW New Japan Cup 2021 - Day 7
2021
NJPW Road to Tokyo Dome 2025 - Day 1
2025
NJPW World Tag League 2025 - Day 6
2025
NJPW G1 Climax 33: Day 3
2023
NJPW Road to Wrestling Dontaku 2026 - Day 4
2026
NJPW G1 Climax 35: Day 4
2025
RevPro Revolution Rumble 2023
2023
NJPW G1 Climax 35: Day 2
2025
NJPW New Japan Cup 2017 - Day 1
2017
NJPW Road to The New Beginning 2026 - Day 8
2026
NJPW New Japan Cup 2021 - Day 4
2021
NJPW 46th Anniversary Show
2018
NJPW World Tag League 2025 - Day 5
2025
NJPW G1 Climax 35: Day 11
2025
NJPW World Tag League 2025 - Day 4
2025
NJPW G1 Climax 32: Day 7
2022
NJPW New Japan Cup 2018 - Day 4
2018
NJPW World Tag League 2025 - Day 9
2025
NJPW G1 Climax 33: Day 1
2023
NJPW G1 Climax 33: Day 11
2023
RevPro Epic Encounter 2023
2023
NJPW G1 Climax 27: Day 15
2017
NJPW World Tag League 2025 - Day 7
2025
NJPW G1 Climax 34: Day 2
2024
NJPW Road to The New Beginning 2026 - Day 10
2026
NJPW New Japan Cup 2025 - Day 3
2025
NJPW New Japan Cup 2021 - Day 12
2021
NJPW G1 Climax 35: Day 5
2025
NJPW New Japan Cup 2021 - Day 9
2021
NJPW G1 Climax 27: Day 6
2017
NJPW New Years Golden Series 2022 - Day 6
2022
NJPW G1 Climax 35: Day 6
2025
NJPW New Japan Cup 2021 - Day 11
2021
NJPW New Japan Cup 2026 - Day 8
2026
NJPW G1 Climax 35: Day 17
2025
NJPW G1 Climax 35: Day 9
2025
NJPW Hiroshi Tanahashi ~ Final Homecoming
2025
NJPW New Japan Cup 2026 - Day 4
2026
NJPW G1 Climax 35: Day 8
2025
NJPW New Japan Cup 2026 - Day 7
2026
NJPW World Tag League 2025 - Day 10
2025
NJPW Wrestling Toyonokuni 2017
2017
NJPW World Tag League 2025 - Day 8
2025
NJPW Road to Wrestling Dontaku 2026 - Day 7
2026
NJPW Road to Wrestling Dontaku 2026 - Day 8
2026
NJPW Road to Tokyo Dome 2025 - Day 3
2025
NJPW New Japan Cup 2018 - Day 1
2018
NJPW G1 Climax 31: Day 1
2021
NJPW G1 Climax 35: Day 1
2025
RevPro & NJPW: Global Wars 2018
2018
NJPW G1 Climax 27: Day 13
2017
NJPW Road to Wrestling Dontaku 2026 - Day 5
2026
RevPro Uprising 2022
2022
NJPW G1 Climax 27: Day 12
2017
NJPW World Tag League 2025 - Day 11
2025
NJPW Road to The New Beginning 2026 - Day 2
2026
RevPro Uprising 2018
2018
NJPW G1 Climax 35: Day 10
2025
NJPW Road to The New Beginning 2026 - Day 4
2026
NJPW Road to Wrestling Dontaku 2026 - Day 6
2026
RevPro: Live At The Cockpit #46
2019