This item is unopened. I plan to ship via regular mail (teikeigai). I will ship from a small, familiar post office window and keep the receipt. Therefore, if the item is not delivered, it will be easier to investigate, but since it's regular mail, I can only assist with an investigation request. If you are concerned, shipping via Mercari's delivery service is also possible for an additional fee. I don't know when the item will sell, so I've set the shipping period to the maximum, but I may ship it immediately. If you're in a hurry, please comment. 250405542