Complex sentence: He is a former Shooto Lightweight Champion, and has also competed in Pride, Dream, Strikeforce, ONE FC, and also competed in the Yarennoka! event as well as Dynamite!! 2009 and Dynamite!! 2010, representing Dream in both events.
Split into simpler sentences: He is a former Shooto Lightweight Champion, and has also competed in Pride, Dream, Strikeforce, ONE FC. Kawajiri also participated in the Yarennoka! event as well as Dynamite!! 2009 and Dynamite!! 2010, representing Dream in both events.