According to an old documentary film (b/w film shot at the Iwama Dojo and featuring Mr. Saito), the Jo taught by Mr. Ueshiba was called "Sanju Jo" or something like that.

Does anyone have any details about the origin of the Jo that Mr. Ueshiba taught? Did he learn it from someone else or did he develop it based upon his understanding of the principles of ken and his Aikido, etc?

Thanks!

Dave Fulton