Re: Origins of Yoshinkan bokken/jo techniques?
From Aikido Journal's recent article on Shioda:
In 1950, Shioda was asked to guard the Tsurumi facility of the Nihon Kokan Steel Company in the wake of the “Red Purge”, so he gathered together some fifty-five of the strongest members of the kendo, judo, and sumo clubs of his alma mater, Takushoku University
I had known Shioda had help setting up his security company, but it sure sounds like he had people around him who would have been able to contribute to the Yoshinkan curriculum.
97 weapons forms in Yoshinkan - much larger weapons curriculum than I had realized.