KDDI Corporation and Okinawa Cellular have announced plans to launch the au International Call Flat Rate service, which offers international calls for a flat monthly rate. Launched in March 2016, the service will be available to customers who subscribe to Kakeho (Unlimited Calling Plan) or Super Kakeho (Unlimited Calling Plan S) for domestic calls in Japan. The au International Call Flat Rate service will be offered for a monthly fee of JPY 980 (tax exempt) to customers who subscribe to the Flat-rate Data 5/8/10/13 service, or JPY 1,480 (tax exempt) to customers who subscribe to the Flat-rate Data 2/3 service.

The service will provide great savings by enabling up to 50 voice calls per month at no extra charge, as long as each call is 15 minutes or less. For calls that are longer than 15 minutes, the same calling charge as for domestic calls (JPY 20/30 seconds) will be applied to the portion that exceeds 15 minutes. The areas covered by the service will include 23 countries and territories when the service is launched, with more to be added in the future.