Ginza is a well known place to shop high end brands like Chanel, Bulgari, Armani, Louis Vuitton etc. But on far side of that street there's one famous building selling all variety of toys, The Hakuhinkan Toy Park. This one is like a department store of toys, all kinds of stuffs are here but in minimal amount of choices, and the pricing is higher than what I saw in Akihabara which would be the next part of my Toy Hunt series.
Next part will be at Akihabara
You could also check out Nakano Broadway here