Get Credentials to Access Japan Post Shipping API

Overview

AfterShip Shipping is the best multi-carrier shipping software and API that enables you to automate shipping processes across USPS, UPS, FedEx, DHL, and 90+ other couriers. Get the required credentials and access Japan Post shipping API via AfterShip Shipping in just a few steps.

Get Japan Post Developer Credentials

1. Email Japan Post sales representative and cc support+shipping@aftership.com. Tell Japan Post you need to obtain Japan Post API credentials. 
2. Japan Post will provide testing credentials for both Sandbox and Production environment: consignor ID

Required Japan Post API credentials

• consignor_id

Developer resources

• Read Japan Post docs
• Supported Japan Post service types and service options
• AfterShip Shipping Japan Post technical support: support+shipping@aftership.com

Updated on: 27/10/2025