I found these links while surfing around looking for information on this show. I'm not sure if this is the same show though, NG has done several pieces on this subject. Anyway, I thought these might be of interest to some:

Japan's "Way of the Warrior"
http://magma.nationalgeographic.com/...geographic.com


Field notes from "The Samurai Way"
"On Assignment"

http://magma.nationalgeographic.com/...signment1.html