|Originally posted by akiy
I don't think the founder had any real formal studies with the jo nor the spear... Stan Pranin in his interview on this site says about the founder:
Aside from Stan's historical speculation,
Koichi Tohei Sensei teaches that the movements of the jo that we do are a combination of movements adopted from yari, naginata, and staff.
makes sense when going through the movements, and it would be sort of hard to believe that Osensei had not seen these three weapons used a number of times as well as done some training in at least one of them.
it's pretty clear we are not doing some form SMR jodo or or other koryu in these weapons.