Regarding import tax to the United States

To customers in the United States
Due to tariffs of United States, we need to ship items to United States with DDP (Delivered Duty Paid) option according to FedEx policy.
So we decided to collect 15% customs duty in advance on orders to United States for orders placed on or after November 15 (Japan Time).
Package to United States will be shipped using the DDP option, so you will not need to pay customs duties upon receipt.

To customers outside the United States
For shipments to countries other than US, customs duties must be paid upon receipt by recipient same as before.
Regarding tax, please check here.