Here's a picture, I believe, of the sign that Raul is talking about (courtesy of Google Street View):
http://tinyurl.com/p3kfdn
And, here is the rather bland facade of Aikikai hombu dojo (also courtesy of Google Street View):
http://tinyurl.com/nps7mq
The Ueshiba family lives next door (fuzzy nameplate picture, also courtesy of Google Street View):
http://tinyurl.com/pktefs
-- Jun