In late October 2013, KDDI and Okinawa Cellular will improve their next-generation high-speed 4G Long Term Evolution (LTE) communication services, by providing high-speed data communications at a maximum downlink speed of 150 Mbps . After launching the service in some areas of Chiba prefecture, availability will be gradually expanded across Japan.
For details on area availability, refer to the au website at the link below.
au website - Areas that support 150 Mbps
(*As of October 2, 2013)
isai LGL22, Xperia (TM) Z1 SOL23, GALAXY Note 3 SCL22, AQUOS PHONE SERIE SHL23, ARROWS Z FJL22, DIGNO (R) M KYL22, and ARROWS Tab FJT21