Huge and complicated Shinjuku station.
This video will explain Shinjuku station in an easy-to-understand.

00:00 Introduction
01:22 To West turnstiles
04:25 To East Ticket Gate
06:40 To Central Ticket Gate
08:39 To Central East Ticket Gate
09:57 To South Ticket Gate
11:33 To Southeast Ticket Gate
13:11 South Exit Concourse
16:37 To New South Area
18:23 To Koshu-kaido ticket gate
19:59 To New South ticket gate
21:15 To Shinjuku Basta
22:39 To the ticket gate of the MIRAINA Tower