Matsuya and Mitsukoshi Depachika Walkthrough 

This is a quick walkthrough of the Matsuya and Mitsukoshi department store basements. Mind you, these are only the basements. Each building features several above-ground floors of full restaurants as well. This is also not the most dense nor most diverse walkthrough that could be done in 10 minutes - I believe Tokyo Station or Shinjuku Station could beat it, although I haven't looked at the routes yet.