Note on the Subway systems in Tokyo

I just noticed on my last post, the map at the top of the post is only the "JR" system, it doesn't include the other subway lines run by other companies (These lines are termed "Metro" lines).

Thus the link I provided to the complete map is a far better representation of the entire Tokyo train system. tokyo metro map

ie, to get to Ginza from where we are, you would get on a JR line train at Shinagawa to Shimbashi, then change over to the Metro system, get on the "Ginza" lines and get off at Ginza station (which is station G09 on the Ginza line).