No.7017
nevermind, they're RFID cards
No.7018
IC cards (ICカード)
No.7019
you can get phones which are able to read them
No.7022
My Suica card on it probably still has like ¥300 on it.
Poor thing must be feeling sad from being unused in so long.
No.7063
>>7022don't worry, I think I read somewhere that they're valid for like 20 years without being used!