USPS Postage Rates for Large Envelopes to Japan (2024 Guide)

Sending a large envelope to Japan? The United States Postal Service (USPS) determines postage based on weight, dimensions, and shipping speed. For standard Large Flat Rate Envelopes (up to 13 oz), here are the current international options:

USPS International Shipping Options to Japan

First-Class Mail International

Estimated delivery: 7–10 business days
Cost: $20.50 for envelopes ≤ 13 oz

Priority Mail International

Estimated delivery: 6–10 business days
Cost: $39.00 for envelopes ≤ 13 oz

Priority Mail Express International

Estimated delivery: 3–5 business days
Cost: $48.00 for envelopes ≤ 13 oz

Important Considerations

Rates apply to standard-sized envelopes. Oversized, rigid, or irregularly shaped items may incur additional fees. Always verify exact postage using the USPS Postage Calculator before mailing. Customs forms are required for all international shipments.

Pro tip: For valuable or time-sensitive documents, Priority Mail Express International includes tracking and limited insurance.