Tanabe originally trained in Puerto Rico and was a member of the first graduating class of Taka Michinoku's Kaientai Dojo (K-Dojo).

[3] Whilst also competing in AJPW, he debuted in Kaientai Dojo where he would become a mainstay for the majority of his career, winning the UWA World Middleweight Championship in October.

[7] On August 15, Hiroki and Kengo Mashimo captured the Strongest-K Tag Team Championship, defeating Kaji Tomato and Taishi Takizawa.

[10] In early 2011, he teamed with Ricky Fuji in the 2011 Kaientai Dojo Tag League, finishing in Block A with 2 points and failing to advance to the next round.

[11] On October 9, after holding them for over a year, Hiroki and Mashimo lost the Strongest-K Tag Team Championship to Ryuichi Sekine and Saburo Inematsu.

In December 2016, he competed in Pro Wrestling Noah for the first time since 2005, teaming with Ricky Fuji in a loss to Daisuke Harada and Akitoshi Saito.

[16] After impressing new president Masayuki Uchida, he was offered a regular position with the promotion and began competing with them as a full-time roster member later that month.

On April 15, 2018, Hi69 and Minoru Tanaka defeated Hayata and Yo-Hey to win the vacant GHC Junior Heavyweight Tag Team Championship.