The International Bujinkan Dojo Association or IBDA is a group of dojo's around the world grouped together under 15th Dan Shihan Richard Van Donk.

IBDA's history began in 1985 with when Shidoshi Richard J. Van Donk was sanctioned by Grandmaster Masaaki Hatsumi Soke of the International Hombu Dojo in Japan to help build unity and to spread the teachings of the nine traditions of Ninjutsu throughout the United States and abroad.
_{- quote from www.ninjutsu.com}

Website:  http://www.ninjutsu.com/