I know Takeda S. was trained by noteable sword teachers - not the point I was trying to make. He was not particularily famous for his sword skills or for using it in any "swashbuckling"way. Same with Ueshiba M. and Saito S.
Yagyu Shinkage-ryu kenjutsu menkyo from Sokaku in 1922.
You mention two schools that Takeda S. was connected with - what about Yagyu Shinkage-ryu. What is his connection there?