Best carrier from US to Japan is Yamato but you don't have integration with it. Strongly suggested.
New
Yamato Carrier Integration
Hello @thegerdan!
Thank you for your post in the community! The good news is that Yamoto can sign up to become a partner with ShipStation. Here’s the link for them to submit an inquiry for partnership approval.
Happy Shipping!
-Cara
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.