Kathryn, I respectfully disagree. From my experience thus far with Japanese martial arts (I moved there to train in very traditional martial arts, and have since come back to the USA , where I share it as my full time career), I believe that the effects of fear are quite directly incorporated into the methods.
The startle/flinch response is inherent to the movements of very old Japanese martial arts, and they benefit from mostly gross motor movement, scanning motion, lowered hips, etc - all things that happen when the body experiences various stages of fear.
I've enjoyed "Sharpening the Warrior's Edge"
as a quick informative resource on some of these effects.