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 03-5451-3640
Address Tokyo, Japan
Coordinates 35°39'2.477" N 139°38'13.411" E