I've contact to Japanese Post Office earlier. It won't take the additional charge. I've paid the shipping charge. I think it is a tax. Do you understand the custom? If you received the item, please let me see the document.
I checked at Post of Japan, but Japanese post did not take additional fee. I pay for transport fee. It may be custom duty. Do you know about custom duty? If I receive item, will you show documents?
「I've contacted Japanese Post Office earlier.」です。失礼いたしました。