autosend is an online service. But it has a customer support counter at Shinjuku.

▶ Shinjuku Head Office 9:00 - 18:00 (closed on weekends and holidays
2F, Shinjuku Uchino Building II, 1-36-7 Shinjuku, Shinjuku-ku, Tokyo 160-002
Email address: info@autosend.jp