i used a canon powershot A75 with a tripod. regular lens, manual setting with aperture of 4.0 and a shutter speed of 0.5 seconds. hahaha, pretty basic, but a good starter camera for sure. i've since upgraded to a digital rebel, which allows for a lot more options.
I was there in the mid 70s. But it looks much the same - traffic, lots of electric lights and over abundance of people! An electric city it is. All the lights and moving folks make this an exciting place to be. Thanks for reminding me of Tokyo :)