I was not suggesting that they were students together. I was taking off from your own earlier post about the differences between Osaka area aikido vs. Tokyo aikido. Peter is right about the thread drift. sorry
No problem, Raul.
The original poster asked specifically about Bansen Tanaka, but such is the nature of aikido in Osaka that some thread drift is inevitable. Mention aikido in Osaka and the name of Hirokazu Kobayashi will almost certainly come up. As far as I can see from their students, Kobayashi's aikido and Tanaka's were quite different.