tenso.com offers the following shipping methods.

・EMS
・AIR (Airmail)
・SAL (Economy Airmail)
・Surface Mail (Sea Mail)
・DHL Express
・ECMS
・Taiwan FamilyMart Pickup Service (Taiwan Limited)
・tenso Air Delivery Taiwan

If the package is not allowed to ship with Japan Post (EMS/AIR/SAL/Surface Mail), tenso.com customer service will notify you of the alternative by email.

For more information, please check the link below.
About International Shipping
https://www.tenso.com/en/static/guide_deliver_index
Usage Fee
https://www.tenso.com/en/usage_fee