He was one of the original graduates from the
Toryumon dojo. He was also one of the founding members of the Crazy Max and Blood Generation stables. He made a few appearances in
World Championship Wrestling as Sumo Fuji. He has wrestled as Karaoke Machine #1 at times as well. From 1999 until 2002, he changed his name annually. He first went from Sumo Fuji to Sumo "Dandy" Fuji, then to Sumo "Dandy" Fuji 2000, then to Big Fuji, and finally to Don Fujii. Fujii has spent most of his Toryumon/Dragon Gate career in heel stables. He was a founding member of Crazy Max, as well as a founding member of Blood Generation. When Blood Generation ended in December 2006, Fujii signed on with Magnum Tokyo's
Renaissance project. The project never went anywhere as Tokyo suffered a career-ending eye injury shortly after it started. When Cima started the
Typhoon stable, it caused the first split between Cima and Fujii, as Fujii did not want to align himself with
Susumu Yokosuka and
BxB Hulk. He is currently aligned with
Masaaki Mochizuki and
K-ness as part of a "seniors" unit. The three of them had an Open the Triangle Gate title run, but upon losing the belts, K-ness stepped back into a lower card role in the promotion while Fujii and Mochi have been focusing on representing Dragon Gate in other promotions. In 2008, the duo added
Magnitude Kishiwada to their ranks, and the trio would eventually win the Open the Triangle Gate Titles from
Yasushi Kanda,
Yamato and
Gamma on September 28. They held them until February 15, 2009, dropping them to
Shingo Takagi,
Taku Iwasa and
Dragon Kid. On April 12, he teamed with
Kikutaro to beat
Hollywood Stalker Ichikawa and Magnitude Kishiwada to become the inaugural Open the Owarai Twin Gate Champions. On October 14, he added the Triangle Gate titles to his collection, teaming with Masaaki Mochizuki and
Akebono to defeat the champions
Masato Yoshino,
BxB Hulk and
Pac. On May 13, 2010, Fujii, Mochizuki and Akebono lost the Open the Triangle Gate Championship to
Cima,
Gamma and
Genki Horiguchi. On January 10, 2011, Fujii and Mochizuki defeated
Naruki Doi and Gamma to win the
Open the Twin Gate Championship. They would lose the title to Genki Horiguchi and
Ryo Saito on February 6, 2011. On September 23, 2012, Fujii and Mochizuki, now representing the Kaettekita Veteran-gun stable, regained the title from Shingo Takagi and Yamato. They lost the title to BxB Hulk and
Uhaa Nation on March 2, 2013. On June 14, 2015, he, Cima and Gamma defeated the Jimmyz (Ryo "Jimmy" Saito, Genki Horiguchi H.A.Gee.Mee!!, and Jimmy Susumu) to win the Open the Triangle Gate Championship. On October 8, Cima and Gamma formed a new unit called Over Generation with
Eita,
El Lindaman,
Punch Tominaga, and rookies
Takehiro Yamamura and
Kaito Ishida. Don Fujii did not join the new unit despite holding the Open the Triangle Gate Championship with Cima and Gamma. On November 1, he, Cima, and Gamma defended the Open the Triangle Gate Championship against the Jimmyz (Jimmy Susumu, Jimmy K-Ness J.K.S., and Ryo "Jimmy" Saito), and vacated the titles afterwards. ==Championships and accomplishments==