au roaming prices by destination
Choose a destination to see the cheapest official way to get about 5 GB for a week with au, next to a travel eSIM for the same week.
Compare for your trip
South Korea: about 5 GB for a week
- au, about 5 GB for 7 days
- ¥5,600 · 7 × au海外放題 · uses your plan's Japanese allowance
- eSIM For U, 5 GB for 30 days
- $9.49
- eSIM For U daily plan, 7 days
- $10.69 · 1 GB per day
| au · 7 days | eSIM For U | |
|---|---|---|
 South Korea | ¥5,6007 × au海外放題 · uses your plan's Japanese allowance | $9.49eSIM For U, 5 GB for 30 days |
 USA | ¥5,6007 × au海外放題 · uses your plan's Japanese allowance | $9.49eSIM For U, 5 GB for 30 days |
 Thailand | ¥5,6007 × au海外放題 · uses your plan's Japanese allowance | $7.09eSIM For U, 5 GB for 30 days |
 Vietnam | ¥5,6007 × au海外放題 · uses your plan's Japanese allowance | $9.49eSIM For U, 5 GB for 30 days |
 Singapore | ¥5,6007 × au海外放題 · uses your plan's Japanese allowance | $8.59eSIM For U, 5 GB for 30 days |
Official price list of au, checked 3 Nov 2026. Standard plans; older contracts may differ. Source Prices in different currencies, not converted.
All au data options
| Data | Valid | Price | |
|---|---|---|---|
| au海外放題 | Plan data | per day | ¥800 |
| au海外放題 | Plan data | per day | ¥1,000 |
| au海外放題 | Plan data | per day | ¥1,200 |
au roaming by destination
- au roaming in South Korea
- au roaming in the USA
- au roaming in Thailand
- au roaming in Vietnam
- au roaming in Singapore
- au roaming in the Philippines
- au roaming in Malaysia
- au roaming in Canada
- au roaming in Indonesia
- au roaming in India
Keep your au number, use eSIM data
- Install the travel eSIM at home
Buy and install it over Wi‑Fi before you leave. Your au SIM stays in the phone. See how to install on iPhone or on Android.
- Use the eSIM for mobile data
In your phone settings, choose the travel eSIM as the line for mobile data. Calls and texts can stay on your au number.
A travel eSIM for South Korea
South Korea is the destination travellers from Japan search most often with a travel eSIM. These are live prices for it, to set against the au options above.
Prefer a daily allowance? 1 GB per day · 7 days for $10.69: full speed up to 1 GB a day, then 512 Kbps until the next day.
Picked like in our shop: the cheapest plan with about 0.7 GB a day. Live prices for South Korea.
Questions and answers
Is roaming included with au?
Not in the standard plans of the au price list we checked. Abroad you pay a pass or a daily charge, shown in the table above.
Can I use a travel eSIM with my au number?
Yes. Keep your au SIM for calls and texts and use the travel eSIM for data. Your phone needs to support eSIM and be unlocked.
Do I pay au anything when I use a travel eSIM?
Not for data, as long as data roaming is off on your au line. Calls and texts on your au number are charged as in its price list.
What if I forget to turn off roaming on au?
Then your au SIM can use data abroad at the au rates for that destination. Turn off data roaming for that line before you land.
Updated 3 Nov 2026 · checked against our live catalogue
How we check our data · Prices and plans come live from our catalogue; facts come from official sources, listed where we use them.
