Michael Mackenzie wrote:
In regards to Takeda's knowledge of IMA, it's interesting to note that there are members of the Daito Ryu that do very similiar ki tricks. Even Tokimune Takeda, Sokaku's son, can be seen doing various tricks on some demonstration footage on Mr. Pranin's site. I've also seen footage of Seigo Okamoto doing similiar tricks. He was a student of the aforementioned Kodo Horikawa I believe.
I haven't done my homework... I missed the video clips on the Aikido Journal site. I'd say probability is very strong now that Ueshiba's initial knowledge comes via Takeda Sokaku.... in my opinion.