In addition, only some types of electronic money (as of March 2007, ID (credit settlement service), DCMX, Edy, and IC E-card) are acceptable, and this means that it will take longer for the electric money system to become familiarized.
さらに一部の電子マネー（2007年3月時点ではID(クレジット決済サービス)、DCMX、Edy、ICいーカード）しか利用できず、普及にはなお時間を要する。