Tsuyoshi Kosaka

Pride 31: Unbreakable (promoted in Japan as Dreamers) was a mixed martial arts event held by Pride Fighting Championships on February 26, 2006 at Saitama Super Arena in Saitama, Japan. It was also the first Pride pay-per-view event of 2006.

UFC 16 was an MMA event held by the UFC on March 13, 1998 in New Orleans, Louisiana, live on pay per view in the USA and later released on home video. It featured the first UFC Lightweight tournament, a Middlteweight Championship bout, a Heavyweight and a Middleweight Superfight.

Pride Bushido 6 was a mixed martial arts event held by Pride Fighting Championships. It took place at the Yokohama Arena in Yokohama, Japan on April 3, 2005. Under BUSHIDO rules, matches are 2 rounds only.

Pride Total Elimination Absolute was a mixed martial arts event held by the Pride Fighting Championships. It took place at the Osaka Dome in Osaka, Japan on May 5, 2006.