I'll be in Tokyo, and I'd like to visit Yokohama as a day trip. What are the must-see sights there? I would like to maximize the amount of things to see there, and I don't mind hanging around there in the evening (as long as there's a train back to Tokyo in the night). In addition, I'd like to see the must-see sights there, but I don't want to see things that take many hours to see, like a big museum, aquarium, etc. Also, any off-beat things to see would be cool too. Finally, what kinds of food or food spots are there to go there? Your input is appreciated. Thanks.