Contact information

Customer Support (B2C)
Wholesale Inquiries (B2B)

Please contact the appropriate department for a prompt response.

Head Quarter (Administrative Office)

Legal Entity: OPENTHEORY, Inc.
Address: 2-25-34 Nakatehara, Kohoku-ku, Yokohama, Kanagawa 222-0023, Japan
Phone: +81-45-633-1995
⚠️ NO RETURNS ACCEPTED HERE

*Please DO NOT send any packages to this address.

✅ Return Warehouse (For Product Returns)

Attn: ANBERSO Global Returns
Address: 2410-3 Okawado, Matsubushi-machi, Kitakatsushika-gun, Saitama 343-0106, Japan
Phone: +81-45-633-1995

STEP 1: Contact info@anberso.com for authorization.
STEP 2: Ship your package ONLY to this address.