Hello,
I am Japanese, living in Japan. I have found a website where you can purchase the product.
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The website states that it purchases the product directly from the producer for resale. And because of that, you can receive customer support. I think this website is a kind of direct sales store.
For your information, currently, it appears they have items in stock, as I am able to add them to the shopping cart.
If you need further assistance, I am happy to help.
Please let me know if you need any more information or assistance.