You can change it yourself.
After logging in, please go to [Confirm/Change Member Information > Member Information > Edit] on
your My Page to complete the procedure.
If there are any changes to your address, please make the necessary changes as soon as possible, as this may result in your shipment not being delivered.
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Please be sure to access the site using a web browser (Safari/Chrome).
In-app browsers (Yahoo JAPAN app and Google app) are not guaranteed to work.