After searching around the board there seem to be 2 differing opinions regarding Yokohama.
GG lets the chef run with the ball and seems to love it.
Others had bad experiences with the service and non-sushi items.
I'd love to hear any other updates regarding Yokohama.
Other candidates in the running are:
Oishii (might be too small for our group of 6),
Fugakyu (been there, I am indifferent), and
Ginza Chinatown (I enjoyed my last slightly overpriced visit, but its no-reservation policy on Sat nights is a problem).
I've read some buzz regarding Mr. Sushi on Harvard Ave in Brookline here before - thoughts on it would also be welcome.