Re: No Competition in Aikido(excluding Tomiki)
Mochizuki volunteered to go train with Ueshiba and send monthly reports to Kano. I believe that Tomiki was, indeed, introduced by Hidetaro Nishimura from the Waseda Judo Club.
Daito-ryu claims origins in the ancient art of Tegoi - that art is mentioned in the Kojiki, which is, I believe, the extent of the "connection" (like saying that I'm "connected" with the Bible because I've been to Israel, and Israel is mentioned in the Bible). Daito-ryu as an art is not generally concerned with the Kojiki.