This is a Korean Air mileage exchange keychain, not for sale. It's likely rare in Japan as it was designated for pickup within Korea. It's a collaboration keychain between Korean Air and Starbucks, and according to the description, you can charge it with money and use it for payments. I'm also selling a set with a Korean Starbucks mobile mug. It's unused. #KoreanAir #airplane #aircraft #KoreanAir #cafe #Starbucks #IncheonAirport #Korea #starbacks #cafe #mobilemug #mug #keychain