This item was purchased directly from Sunsorit by the clinic. We do not provide proof of authenticity, so if you are concerned, please purchase from the official online store. Purchases made by 2 p.m. will be shipped almost the same day. We were severely reprimanded because we did not respond to price negotiations even though the "Accept Price Reduction" button was turned on due to our mistake. We are careful, but we generally do not offer discounts even if the "Accept Price Reduction" button is on. We ask everyone to purchase at this price. Please consult with us in the comments for combined purchases or bulk purchases. Please check the Japan Post website for detailed delivery dates. For deliveries by courier, customers in Hokkaido, Okinawa, and remote islands may be subject to surface or sea transport, which may take about a week to arrive. Please contact Kuroneko Yamato directly for the reason and delivery date. We will send it in simple packaging, so the corners may be damaged. Please be understanding. Due to manual polishing, linear marks may appear on the surface, but this does not affect use at all (excerpt from Sunsorit's text). We kindly request that you purchase if you agree to no returns or claims.