2 links
Mitose International Kosho-Ryu Kenpo Association
kosho-ryu.com
Headed by Thomas Mitose, James Mitose's son. Features a family tree, biographies of the founders, details in the symbolism of the code of arms, and related resources.
Sei Kosho Shorei Kai International
collectivesociety.com
Organization headed by Bruce Juchnik Hanshi. Contains several articles on the style, listing of affiliate schools, upcoming events, and membership information.