Avoid au (KDDI) roaming fees
Japanau's own published example charges ¥125 per minute for calls home from South Korea, more than double that (¥265/min) for calling anywhere other than Japan while abroad.
How au (KDDI) charges for roaming
au's rate depends on the local partner network in each country — its own site gives Korea as the worked example (¥125/min to Japan, ¥265/min to a third country) rather than one flat global figure, and its Kaigai Houdai data pass doesn't include calls.
Daily pass: au Kaigai Houdai data pass from ¥800/24h — data only, no voice
- Checked September 15, 2026, source: au.com
/mobile /service /global /au-world-service /area-charge
How to avoid the daily fee
Connect to Wi-Fi at your hotel or a café and call through QuikRing in your browser instead of paying au's per-minute roaming rate.
Standard out-of-plan rate: ¥125 per minute calling Japan from South Korea (au's own published example; calling a third country from the same trip runs ¥265/min)
First minute free to select destinations, with a verified email.
Step-by-step instructions
- 01Switch off Data Roaming in your cellular settings before leaving home.
- 02Connect to your hotel, Airbnb, or airport Wi-Fi network.
- 03Open QuikRing in your browser and call any number. After your first top-up, verify your own number and, on routes that support it, the people you call see it.
What au (KDDI) customers pay with QuikRing instead
Current per-minute prices from our rate table, in USD. They update automatically whenever a price changes.
| Destination | Mobile | Landline |
|---|---|---|
| Brazil | $0.05/min | $0.03/min |
| South Korea | $0.07/min | $0.08/min |
| United States | $0.02/min | $0.02/min |
Prices checked October 30, 2026.
Frequently asked questions
Does au's Kaigai Houdai pass cover phone calls?
No. Kaigai Houdai is a data-only pass starting at ¥800/24h. Voice calls are billed separately at au's per-minute roaming rate, which varies by the local network partner.