Use of JRP on Tokyo area trains

Hi there!

Yes, you can use the JR Pass on the extensive JR network within Tokyo to great effect. Here's a map of JR lines in Tokyo for reference.

Hope this helps!

Having done this quite a bit myself over the last couple of days I'd add that it is really easy to do this. It's literally a case of showing the pass to the JR staff member at one end of 90% of the JR station ticket gates (often in a little booth) and he/she just waves you through with a "dozo" ...

Very cool!