If you take the Ginza line from end to end, you’ll begin in Shibuya (yum yum!) and end in Asakusa. Not Akasaka, which I’ve had a horrible habit of confusing the two.
You can tell you’re in Asakusa because:
#1: There’s a river. Neat.
#2: The oldest western style tavern (since 1891) is here.
#3: You can see the Phillipe Starck designed “golden turd” when you come up from the subway and look towards the bridge.
Actually it’s called the Asahi Dry Golden Beer Hall or something like that. There’s a couple of restaurants inside but nothing like the Yebisu Beer Museum that I went to on my first visit here.