Shinjuku Daikan Plaza A-kan 新宿ダイカンプラザＡ館
7 Chome-1-7 Nishishinjuku, Shinjuku-ku, Tōkyō-to 160-0023
1 minute walk from Shinjuku-Nishiguchi Station on Oedo Line, 3 minutes walk from Seibu-Shinjuku Station on Seibu Line and 5 minutes from Shinjuku Station on Yamanote Line and Tokyo Metro.
From Yamanote and Marunouchi Line, you follow the West exit, then the Seibu Shinjuku Square sign and take exit B14/B15.
From Oedo Line, you take exit D5.
The office is a place he is renting by the hour. Please don’t send anything there.
Please note that the Google Maps location shows the back of the building!