International shipping is also possible if you use http://tenso.com .

When you access ARIKA product page, there is a "Click here for overseas shipping" banner under the blue cart button.
1. Register as a member of "http://tenso.com " from the banner link.
2. Japanese address will be given to you to deliver the products.
3. Please purchase the product using the given address.
4. First, it will be delivered to a warehouse located in Japan.
5. Then, it will be shipped to the overseas address you registered in http://tenso.com .

Please see the following links for more information:
https://www.tenso.com/en/static/guide_buy_index
https://www.tenso.com/en/static/guide_flow_index

The official goods website is written in Japanese, so I would be glad if you use ↓these as a reference.