During the day, Shinjuku's massive department stores,
from Shinjuku Station eastwards, are a culture unto themselves. Each caters
to a different class of customer, from the bargain basement Keio, to run-of-the-mill
Odakyu, through to ubiquitous Marui, Takashimaya and up to the king of
them all, Isetan.
Basement floors are a grocery/delicatessen/confectionery cornucopia -
full of free munchies (samples are put out to be eaten, not stared at:
foodies, dig in - splash out!), and the service is world class at Isetan.
Read more here about Shinjuku shopping, with a shop-by-shop guide to the
major stores including BIC Camera, Yodobashi Camera, H&M, Forever
21 and Kinokuniya.