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 042-538-3171
Address Japan
Coordinates 35°43'14.484" N 139°25'48.803" E