One of Nobuyoshi Araki's regular haunts, the stairs in Shinjuku is pretty busy. I manged close to a hundred some frames here in an hour. Sadly, none of Araki's nudes were in the area at the time.
Up the stairs worked out better than shooting down. I was midway and caught a bunch of kids coming up and down at the same time but I can't find them for the life of me to post.