One of the more colorful spots in Tokyo is Akihabara Electric Town.
The streets of this neighborhood are full of vendors and stores selling the latest and greatest in electronics and related widgets. You can not only buy mainstream electronics such as TVs, mobile phones, and cameras, but you can also pick up cables, outlets, plugs, circuits, and other widgets.
For more about Akihabara, here is an interesting Washington Post article.
This crosswalk appears in the popular Keepon Dancing video.