au, or au by KDDI, is a brand marketed by KDDI in the main islands of Japan and by Okinawa Cellular in Okinawa for their mobile cellular services.
Wikipedia https://en.wikipedia.org/wiki/Au_(mobile_phone_company)
Official Website http://www.au.kddi.com/
Phone +81 3-3837-8820
Address Tokyo, Japan
Coordinates 35°42'38.132" N 139°46'34.596" E
