I purchased this about three years ago at Ginza Matsuya. I've already discarded any receipts or paperwork. Regarding usage, I've used it less than 10 times since I bought it, and each time was for a short period. I used it carefully, and since I didn't use it often, I mostly kept it in storage. Personally, I don't see any noticeable damage, but I would appreciate it if you understand that it is used.