I purchased three boxes this year on Amazon. They cost a total of 12,000 yen. They are being offered at a bargain price because the expiration date is approaching. There are two sets remaining, and this is a per-unit offer. Shipping costs are high, so I apologize that the price is slightly higher than last time. If you are interested in a reset, I would like to offer a discount to 5900 yen. Thank you.