Japan & South Korea eSIM
2 destinations, one plan · from US$2.50 · activates when you land
An eSIM for Japan & South Korea from SimKit costs US$2.50–US$23.68 (from 1 GB / 7 days up to 10 GB / 30 days). Plans run on KDDI/au with 5G where available. You install it with a tap, usually under two minutes, with no physical SIM to swap, and can top up if you run low.
One plan covers all 2 destinations, including Japan, South Korea, with no swapping eSIMs at each border.
Prices checked September 14, 2026.
Japan & South Korea eSIM data plans
7 days
30 days
Tap a data amount for full plan details. Prices update hourly. You’re charged the exact amount shown at checkout.
No risk in buying early. Your plan activates when it first connects in any of the 2 covered destinations, not when you pay, so you can buy the moment you book your trip. Delivered instantly and installed with a tap, with secure checkout by Stripe. If you can’t get connected, we’ll help you fix it or refund you.
Countries covered by the Japan & South Korea eSIM
One eSIM, 2 destinations. Tap a country for its dedicated plans.
Instant delivery
Your eSIM is ready the moment you pay. Tap to install before you fly.
One eSIM for the whole trip
Cross borders freely. The eSIM hops to a local partner network in each country automatically.
Top up anytime
Running low mid-trip? Add data to the same eSIM in a couple of taps, right from your account. No app needed.
SimKit offers 4 Japan & South Korea eSIMs, from 1 GB up to 10 GB of data, valid for 7–30 days across 2 destinations. Every plan is delivered instantly, installs with a tap, and activates when you arrive.
Frequently asked questions
Which countries does the Japan & South Korea eSIM cover?
The SimKit Japan & South Korea eSIM works in 2 destinations with one plan: Japan, South Korea.
Do I need a new eSIM when I cross a border?
No. The Japan & South Korea eSIM switches to a partner network in the next country automatically. Same plan, same data allowance, nothing to reinstall.
How much does an eSIM for Japan & South Korea cost?
Japan & South Korea eSIM plans from SimKit range from US$2.50 to US$23.68 depending on how much data and how many days you need. The entry plan is 1 GB for 7 days at US$2.50.
Which networks do Japan & South Korea eSIMs use?
SimKit Japan & South Korea eSIMs connect to KDDI/au, with 5G available where the network supports it. You get the same coverage as a local SIM without swapping anything physical.
Is the Japan & South Korea eSIM 5G?
Yes. Where Japan & South Korea's networks offer 5G, SimKit eSIMs use it, falling back to 4G/LTE elsewhere. Speeds depend on your device and local coverage.
How do I install and activate an eSIM for Japan & South Korea?
After you buy, open your order on the phone you'll travel with and tap the install button, or scan the QR code from another screen. The eSIM is ready in under two minutes. Activate it when you arrive in Japan & South Korea.
When should I buy an eSIM for Japan & South Korea?
Any time before you travel. The plan's validity only starts when the eSIM first connects to a network in Japan & South Korea, so you can buy as soon as you book, install on Wi-Fi at home, and it activates when you land.
Can I top up my Japan & South Korea eSIM if I run out of data?
Yes. If you run low, you can add more data to the same eSIM in a couple of taps from your account, right in the browser, without buying a new one or changing your number.
Will the eSIM work in my phone?
Most phones from 2018 onward support eSIM (iPhone XS and later, recent Google Pixel and Samsung Galaxy models) and must be carrier-unlocked. If your phone shows an "Add eSIM" option in settings, you're good.
