This post is from the WWDC26 Wallet Q&A.
I'm curious as to the rationale as to why Japanese IDs are not allowed on wearOS, even though American ones are.
Thanks for your question Tyler. I recommend filing this as an enhancement request in the Feedback Assistant: https://feedbackassistant.apple.com/
For reference, here's the support article covering the My Number Card: https://support.apple.com/guide/iphone/add-your-id-iph9f1847064/ios