From Homma Sensei article Rudy has just linked.
Who can explain me why there are the sounds of kiai heard here
(starting at 3:50), here
(starting at 2:35), here
(starting at 5:08 and continuing here
, or here
(big kiai of O Sensei at 3:35). Kiai heard both in empty hands and weapons practise.
That's the Iwama dojo in the early 60's, isn't it?
Maybe Homma Sensei can. His contact info is found at
Please let us know what he has to say.