I will be passing through Narita on my way home to LA from Guam. I'm still not sure whether I should make the trek into Tokyo from Narita, given the distance, but assuming I do -- where should I eat and drink? I'd like to stay in one area, say Roppongi or Shinjuku or Shibuya. I love all sorts of Japanese food, especially sushi. Also, would it be strange for a single, young woman to visit an izakaya alone? Where else can I get that sort of food? Thanks in advance.