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. Please understand. If I ship without testing the stamp and it is found to be unclear upon arrival, please handle the ink refill or cartridge replacement yourself. I used to ship via regular mail, but due to some lost package issues, I have switched to a shipping method with tracking. If you still prefer regular mail, I can change it for -40 yen. Please let me know in the comments before purchasing.