do you not think 2 days in yokohama might be a bit much?

unless theres something specific he might be after of course.

I just figure that it will be a nice relax trip if he has 2 days... china town and museums on day 1, water front area, landmark tower area day 2 or something like that

I myself cramp all these in one day...

I am just back from Tokyo, and I recommend to do a city view, you can just see how big and pact the city is. Also I found Akihabara very cool and weird at the same time.

lol as did i.

But, I say Yokohama is a MUST see.. I mean, the rest of tokyo is nice and all, and many different distric will definitely give a tourist a culture shock, but Yokohama is a must everytime i visit.. there is something about that city that really attracts me...