Re: Difference between Yoshinkan and Aikikai
Agree with Brian. The only difference is really of teaching method (Yoshinkan is more "Kata" like below Shodan), ultimately the techniques are the same.
Interestingly when I began Aikiaki nomenclature was very like that used by Tomiki Sensei (kotemawashi, kote hinari etc) and became more like Yoshinkan (Ikkajo, Sankajo) as time went on.
I know that if when I'm at "multi-style" Aikido seminars I often end up practising with the Yoshinkan guys even though I'm an Aikikai "softy"