He has also trained in mixed martial arts, catch wrestling and Muay Thai with other New Zealand fighters such as Shane Young, Kai Kara-France, Mark Hunt and Israel Adesanya.

[5] Henry signed with New Japan Pro-Wrestling (NJPW) in early 2016 and debuted in September of that year, losing to Pro Wrestling Noah's Quiet Storm at Lion's Gate Project 3.

[10] He appeared on his first major NJPW show, Destruction in Tokyo on 17 September, teaming with David Finlay against Roppongi Vice.

[11] On 12 November, Henry returned to his home city of Auckland, New Zealand, defeating Hikule'o at a Bad Luck Fale produced show.

In April 2018, he began showing promise within the company, wowing fans with a classic Strong Style showcasing against Tomohiro Ishii during the Dontaku series.

[citation needed] On 4 April 2021 Henare, now going by the ring name Aaron Henare, was revealed as the new member of Will Ospreay's United Empire faction, turning heel in the process, as he teamed up with new stablemates Great-O-Khan and Jeff Cobb to defeat the Los Ingobernables de Japón team of Tetsuya Naito, Shingo Takagi, and Sanada at the Sakura Genesis 2021 event.

[20][21] Henare made his NJPW Strong debut in America, teaming with O-Khan and new United Empire member TJP, to defeat Brody King, Mascara Dorada and Taylor Rust.

At Windy City Riot, Henare teamed with, Cobb, O-Khan and new members, Aussie Open (Mark Davis and Kyle Fletcher) to defeat Bullet Club.

[31] Along with the changes to his look, Henare adopted a new theme song, 'Kai Tangata', performed by the New Zealand based metal band Alien Weaponry and entirely sung in Maori.

On 8 June 2022 episode of Dynamite, Henare, along with United Empire stablemates Kyle Fletcher and Mark Davis of Aussie Open, made their All Elite Wrestling debuts, assisting stable leader Will Ospreay in attacking Trent Beretta and FTR.