Brand new, unopened, and 100% authentic. No need to ask for confirmation. Purchased in October. Retail price: 6600 yen (tax included) I've been using it for about 5 years, and it really works! (^ ^) If you're skeptical, please give it a try at a good price. Please be aware that fakes are also circulating. Please refrain from purchasing if you are overly concerned about details.