AEON have already treated reasonable SIM CARD in their stores cooperate with Japan communications Inc.
This time they will start selling sim lock free mobile phone with sim card.It's rarely seen example.Total communication costs are only about 3,000yen/per month (about 30USD) for customers.
Typical mobile company offer their mobile services for 6,000yen/per month.So,AEON would like to break bad customs in Japan.
AEON:
http://www.aeon.info/en/
Japan communications Inc.
http://www.j-com.co.jp/en/index.html
*English pages