Zonos Prepay app
The Zonos Prepay app is a free mobile app for individuals and small businesses shipping from Japan to the United States. The app handles the entire process: duty calculation, payment, label creation, and customs documentation.
Key features:
- AI-powered photo classification to identify items and assign HS codes
- Duty calculation and payment in JPY
- Japan Post shipping label and customs document generation
- Declaration ID for proof of duty prepayment
- Available in 18 languages
- Free to download, no subscription fees
Download the app:
For detailed instructions, see the Zonos Prepay for Japan Post shippers guide.
Zonos and Japan Post
Prepay U.S. duties and generate your Japan Post shipping documents with Zonos.
As of August 29, 2025, a new U.S. executive order now requires all shipments into the U.S. to be assessed duty. This includes postal shipments. If you're shipping parcels valued at less than $800 USD to the United States using Japan Post, you're now required to prepay U.S. duties before your shipment is dispatched.
Zonos partners with Japan Post to make this process simple. Using the free Zonos Prepay app, you can calculate and pay U.S. duties and generate a Japan Post shipping label, all before visiting the post office.