Re: Difference between Yoshinkan and Aikikai
I don't think that there is a real big difference between these two systems of Aikido. They both more or less do the same techniques, except which is probably the biggest stylistic difference is that they perform the techniques a little bit different i.e. Aikikai perform Nikyo Ura on the shoulder, while Yoshinkan perform it almost like holding a sword etc.
Also I find that they both emphasis the same basic principles i.e. Atemi, Tenkan etc. where the only difference is on this is that they teach them on a different level/way (i think?)