The AJC multilingual official website is online now. Except Japanese, Chinese, Korean and English is available.
Global Connection Corporation Original
"AJC (All Japan Communications) All Japan Prepaid SIM Card"
It is a SIM card dedicated to data communication that can be used in Japan.
Since contracts, cancellation, return of cards etc are unnecessary,
It is a very popular item for the recently inbound (visiting Japan tourists).
Of course, even those living in Japan can use it for domestic travel or business trips. Since it corresponds to high speed communication 4 G / LTE line
You can use it comfortably anywhere in Japan.