In June 2016, White left for an overseas excursion, in which he worked for the American Ring of Honor (ROH) and the British Revolution Pro Wrestling (RPW) promotions through NJPW's international partnerships.

In early 2014, White met New Japan Pro-Wrestling (NJPW)'s Prince Devitt and competed alongside him in a tag team match for VPW.

[6] White left for Japan on New Year's Eve 2015, began further training as a young lion upon his arrival, and made his debut for NJPW on 30 January 2015, losing to Alex Shelley.

[9] White's final match in NJPW took place on 19 June 2016 at Dominion 6.19 in Osaka-jo Hall, when he, David Finlay, and Juice Robinson were defeated by Satoshi Kojima, Hiroyoshi Tenzan, and Manabu Nakanishi.

[12] He teamed with The Motor City Machine Guns (Alex Shelley and Chris Sabin) to defeat Kamaitachi and The Addiction (Christopher Daniels and Frankie Kazarian).

White and The Motor City Machine Guns eventually formed a stable named "Search and Destroy" with Jonathan Gresham and Lio Rush.

[19] On 6 June, White received his biggest title opportunity in his career at the time when after winning a Battle Royal he unsuccessfully challenged Christopher Daniels for The ROH World Championship in a triple threat match.

On 5 November 2017, at Power Struggle, White returned to NJPW as the mysterious "Switchblade.” He had been teased for the past several months, challenging Hiroshi Tanahashi to a match for the IWGP Intercontinental Championship at Wrestle Kingdom 12 in Tokyo Dome, before attacking him.

On 25 March, he went on to defend the title for the first time against Hangman Page at NJPW Strong Style Evolved Event in Long Beach, California.

[35] At the G1 Supercard on 6 April, Okada defeated White for the IWGP Heavyweight Championship, ending his reign at 54 days and no successful title defenses.

[51] After an absence due to the COVID-19 pandemic, White returned on the 21 August episode of Strong, teaming with Bullet Club partner Chase Owens in a loss to Villain Enterprises (Brody King and Flip Gordon).

[53] At Power Struggle, White defeated Kota Ibushi to become the first wrestler to win the Tokyo Dome IWGP Heavyweight and Intercontinental Championships challenge rights certificate from the G1 Climax winner.

[54] At Wrestle Kingdom 15, White lost to Ibushi, who had won the IWGP Heavyweight and Intercontinental Championships from previous champion Tetsuya Naito.

"[56] At New Year's Dash the following day, White participated in a ten-tag team match with Bullet Club teammates Bad Luck Fale, Chase Owens, Evil, and Yujiro Takahashi, against Chaos members Yoshi-Hashi, Tomohiro Ishii, Kazuchika Okada, Hirooki Goto and Toru Yano, which they lost after Ishii pinned White.

[57] After a month long hiatus, White returned on February 1 on the Road to the New Beginning show, attacking Ishii and continuing their feud.

On November 13, 2021 at Battle in the Valley Jay White lost the NEVER Openweight Championship to Tomohiro Ishii ending his reign at 195 days with 1 successful defense [61] White returned to Japan on May 1, at Wrestling Dontaku, attacking reigning IWGP World Heavyweight Champion Kazuchika Okada after his match against Tetsuya Naito, challenging Okada to a match.

He also insulted "Hangman" Adam Page, who had called out former champion Okada on Dynamite earlier that week, teasing confrontation leading up to AEW×NJPW: Forbidden Door.

[66] This result led to Tonga receiving a shot at the IWGP World Heavyweight title on October 10 at Declaration of Power, though at the event White retained the championship.

[67] At Wrestle Kingdom 17 on January 4, 2023 at the Tokyo Dome, White lost the IWGP World Heavyweight Championship back to Okada, ending his reign at 206 days.

[75] On the August 12 episode of Impact, Bullet Club (White and Bey) lost to FinJuice (David Finlay and Juice Robinson) by disqualification.

on the February 3, 2022 episode of Impact, Bullet Club (Chris Bey, Jay White, Tama Tonga and Tanga Loa) defeated Ace Austin, Jake Something, Madman Fulton and Mike Bailey.

Later that night, White attacked Tama Tonga with a Blade Runner during Guerrillas of Destiny's Impact World Tag Team Championship match with The Good Brothers, allowing Gallows and Anderson to retain the titles as well as take G.o.D's place in Bullet Club.

White appeared in AEW on the February 9, 2022, episode of Dynamite, aiding Adam Cole and The Young Bucks in beating down Trent Beretta and Rocky Romero.

White returned on the April 20 episode of Dynamite, alongside Cole, interrupting Tony Khan and Takami Ohbari's announcement of AEW×NJPW: Forbidden Door on June 26, claiming the event would be "all about" The Undisputed Elite and the Bullet Club.

[77] White once again returned to AEW on the June 15th special Road Rager edition of Dynamite along with his newly won IWGP World Heavyweight Championship, where with a distraction from Cole, he attacked "Hangman" Adam Page from behind with a Bladerunner.

[86] As a singles wrestler, White faced the AEW World Champion, Maxwell Jacob Friedman at Full Gear, where he was defeated,[87] and participated in the Continental Classic tournament, where he finished joint top of his block with 12 pints, allowing him to advance to the semifinal round.

[88] On January 17, 2024, White and The Gunns defeated Mogul Embassy (Brian Cage, Kaun and Toa Liona) for the ROH World Six-Man Tag Team Championship.

[98] On the October 2 episode of Dynamite, White returned from injury and came to the aid of Juice Robinson during an attack by "Hangman" Adam Page, turning into a tweener in the process.

[105] White's interest in wrestling was sparked in 2011 when, at the age of 19, he won a contest held by a New Zealand radio station for a trip to WrestleMania XXVII in Atlanta.