Tokyo suburbs are subdivided into smaller sections of blocks called xxx chome. So Shinjuku Sanchome is the third section block of Shinjuku. Took us a while to figure the addressing system. Once you have figured it out, it makes a lot of sense. Shinjuku Sanchome is a short walk from Shinjuku Station. The Shinjuku Sanchome Metro Station is a smaller Metro but just as important station for an interchange. Outside of the station is a district for all sorts of things – entertainment, shopping, more shops, movie theatres and more. And one of them is Isetan.