The following are some useful links for students of the Bujinkan Dojo:
Written by either former or current Japan residents who have trained extensively with the Japanese Shihan, all of them are filled with excellent and insightful views on Bujinkan Budo.
Various DVD’s and books distributed by Masaaki Hatsumi Soke.
Kodansha Series (Free Delivery)
Wayne Muromoto’s Blog (Must read stuff!)