[Neffiline]

While I was in Tokyo I only had to take the taxi once before we got lost and were quite far from any train stations. I just raised by hand while waiting on the side of the street and got one fairly quickly. I had the address we were going to written on paper so the driver took a look, nodded and off we went.

Like others have said, train and subway is the best so that's what I stuck to. It's quite the experience too!