Josh Reyer

Well, talking only about Yagyu Shingan-ryu and Hozoin-ryu (if we assume, per Ellis Amdur's analysis, that Aioi-ryu was an old term Ueshiba used for aikido, Kito-ryu was a non-standard term for judo, and pleading ignorance about the "Shinkage-ryu Jujutsu"), those are not arts that deal only in one-on-one combat, and only a superficial and naive appraisal of them would see them that way. Which would be understandable, since Ueshiba practiced those arts when young, and only learned the lowest levels.