The Keio West Exit is near. If you come from Chofu and get off in front, you can go to the ticket gate.

There is none

West exit, underground street exit 9

It is located at Shinjuku Station East Exit Square.

100 million people

Usually platform 5 or 6, which is sticking out from south side of the station.

There is.

Not in Japanese. Here is a question related to Shinjuku Station. Go to the end Kawaguchiko by express Azusa in Otsuki transfer Fuji Kyuko's and Shibuya from Shinjuku to go to Shinjuku Yamanote Line out to in Denentoshi from Minamirinkan.

i found wifi at various shops but last time i was at shinjuku station there wasnt a free public wifi i found for japan you could get portable wifi foe a reasonable price anyway. much easier than hunting for free wifi

はい！通勤時間帯は凄く混みます