Although this item is new and unopened, it has been stored for a long time, so the ink may not work. If you are concerned, I can open it and test the stamp before shipping. Please let me know via message after purchase if you would like me to do so. In that case, if the stamp is unclear, I will contact you and then cancel the order. Thank you for your understanding. If I ship the item without testing it and it turns out to be unclear upon arrival, please handle the ink refill or cartridge replacement yourself. I used to ship via standard mail, but due to some lost packages, I have switched to a trackable shipping method. If you still prefer standard mail, I can change it for -40 yen. Please let me know in the comments before purchasing.