After exploring other martial arts, Karl Longstreth began training at the Portland Quest Center at the beginning of 1998. He received his 1st degree black belt in 2001, and was persuaded to return to teach at the Quest Center in 2007.
He is an avid outdoorsman and hunter, and studies the japanese language to supplement his knowledge of To-Shin Do history and tradition.
In 2008, Karl and his wife Marina were joined by Karl Junior, who often accompanies his dad at the Quest Center on Saturdays.