Japan & South Korea
5G on 3 of 3 carriersJapan and South Korea have among the most advanced mobile networks in the world, with dense 5G coverage in cities and fast LTE fallback elsewhere. A travel eSIM removes the need to rent a pocket Wi-Fi device or buy a local SIM, giving you immediate data on arrival.
Plans for Japan & South Korea
Pick a row — it prices the box aboveDevice compatibility
Both Japan and South Korea use some network bands that are not common on all international phones. Before you travel, check that your phone supports the local 5G or LTE bands, or you may only get limited connectivity.
Wi-Fi versus mobile data
Public Wi-Fi is common in cities and stations, but it often requires a login or has time limits. Having your own data is more straightforward for maps and translation.
Local service restrictions
Some local services and websites may behave differently when you are using a foreign eSIM, because your traffic routes through an international connection. If you need access to Japanese or Korean banking or government apps, check with your provider.
Does this eSIM work in both Japan and South Korea?
Yes, the same plan roams on KDDI/au in Japan and SKTelecom and LG Uplus in South Korea, so one eSIM covers both countries.
Will I always get 5G?
All three listed networks offer 5G, and you will usually connect to it in cities. In less populated areas the connection may drop to LTE.
Do I need a local phone number?
No, this is a data-only eSIM. It does not include a phone number, so you should use apps like WhatsApp, Line, or KakaoTalk for calls and messages.
Can I use this eSIM for voice calls?
The eSIM provides data only. Voice calls over the cellular network are not possible, but you can make VoIP calls through apps.
What about device compatibility?
Most unlocked eSIM-capable phones work, but you should verify that your phone supports the LTE and 5G bands used in Japan and South Korea. Some older models may not connect to 5G.
How much data should I choose?
For a typical week of navigation, messaging, and light browsing, 3 to 5 GB is often enough. The plan offers up to 10 GB, and validity is 7 to 30 days.