The 5th graduate of the Dragon Gate dojo, Onodera had previous mixed martial arts experience competing under his real name in Pancrase and was recruited into Final M2K directly after his debut.

He returned in May, aligning with his generation peers Shingo Takagi, BxB Hulk and Cyber Kong in New Hazard, dropping the Gekokujoh lineage completely and renaming himself Yamato.

On April 17, 2008, Yamato betrayed New Hazard and sided with the Muscle Outlaw'z after he attacked his partner Naoki Tanizaki in a tag match against Gamma and Genki Horiguchi.

Then, he, Gamma, and Takagi won the newly-vacant Open the Triangle Gate titles in an impromptu match against Hulk, Naruki Doi and Masato Yoshino.

However, he would win them back from them on July 12, along with Yasushi Kanda and Gamma, and the trio would lose the titles to Masaaki Mochizuki, Don Fujii and Magnitude Kishiwada on September 28.

On March 1, he and Cyber Kong would lose the Open the Twin Gate titles to Susumu Yokosuka and Gamma after stablemate Kagetora interfered and turned on them.

He then went to New Japan Pro-Wrestling to compete in their annual Best of the Super Juniors tournament, hoping tensions would've cooled down by the time he returned to Dragon Gate.

When he returned to Dragon Gate, he continually refused to team with his Real Hazard stablemates, and finally quit the group altogether on June 26.

He joined up with Kamikaze and re-formed his team with Shingo Takagi, and they made a challenge for Ryo Saito and Genki Horiguchi's Open the Twin Gate Titles on July 19.

On June 18, Yamato, Gamma and Yoshino defeated the Blood Warriors team of Cima, Naruki Doi and BxB Hulk to win the vacant Open the Triangle Gate Championship.

[5] On April 19, 2012, Yamato, alongside Shingo Takagi joined with Dragon Gate NEX Member Chihiro Tominaga, and the debuting Super Shenlong III and formed -akatsuki-.

[10] On October 6, Yamato became a double champion, when he, BxB Hulk and Cyber Kong defeated Takagi, Akira Tozawa and Masato Yoshino to win the vacant Open the Triangle Gate Championship.

[13] On December 8, the Mad Blankey duo of Yamato and Naruki Doi defeated the Millennials to win the Open the Twin Gate Championship.

[18] On September 23, Yamato formed a new stable named VerserK with Cyber Kong, Kotoka, Mondai Ryu, Naruki Doi and Shingo Takagi.

[19] On May 6, Yamato and Doi would lose the Twin Gate Championships to Big R Shimizu and T-Hawk, ending their record-breaking 267-day reign with record breaking 9 defenses.

He defeated Shingo Takagi, Cyber Kong, BxB Hulk and Naruki Doi in a cage match on May 5, 2017, at Dead Or Alive, marking his fifth defense.

On the very same show, Yamato cemented his villainous status when he and Gran Akuma engaged in a post-match attack on Mike Quackenbush and Jigsaw, starting a feud with the Chikara wrestlers.

After the conclusion of Fearless' main-event, Yamato ran out with Takagi, Akuma and Richards to beat down both Hulk and Dragon Kid, but the attackers were thwarted by the Chikara wrestlers.

[27] At Mercury Rising, Yamato successfully defended his newly won Open the Dream Gate championship against Susumu Yokosuka in his first defense, while forming the Kamikaze USA stable with Takagi and Jon Moxley.

[35] At Enter the Dragon 2011, Yamato defeated his stable-mate Pac to retain his Open the Freedom Gate championship in his fourth successful defense.