Thanks Demetrio, you are very good at finding links to great sources. I thought this quote on page 227 was very interesting:
According to Tomiki's own words to this author, he learned Yagyu Shinkage-ryu kenjutsu from Kosaburo Gejo with Morihei Ueshiba in his youth. This includes the techniques and concepts of
"Muto-dori", or the methods of defeating an armed opponent while unarmed.