Re: Origin of sword work in Aikido
Actually, the taigi 29 in Ki Society formulated by Koichi Tohei Sensei is kumi-tachi supposedly comes from Yagu shinkage ryu tradition. At least that's according to what a 9th dan told me who should know. It's not supposed to be demonstrated to the public by anyone lower than of Godan rank. It's fun though.
what little Ona-ha Itto Ryu Kenjutsu I have done was fun
if coming from these traditions, various Aiki-ken have mutated from these forms quite a bit.