Re: yamato ryu
Scott - Well, that's all very interesting but irrelevant. The point here is simple. Sato Kinbei created his own martial art. He used certain kanji and the reading HE chose for those kanji was Daiwa. (There are, allegedly, elements of Daito-ryu amongst the 20+ martial arts he claimed to be master of).
The translator who, to the best of my knowledge, chose the reading Yamato. That's fine, but incorrect, when applied to Sato Kinbei's martial art. If you go to Sato's dojo and ask to study Yamato-ryu, you'll be told, "we don't teach anything by that name."