Must confess I am not a big fan of Yoshinkan Aikido.
It's not my preferred style of training either, although I appreciate that its fairly formal structure suits various people, and it can produce some excellent results! Anyway, that's probably a subject for an alternative thread.
One can see the Yoshinkan influences in Tanaka sensei but he's been his own man for a very long time. Very well connected on a personal level within the Aikikai. He has also been designated Mokuhai (Living National Treasure) by the Japanese government for Budo - I'd be interested to know who else in the Aikido world has been so honoured.