Simzora.
Japan & South Korea eSIM

Japan & South Korea eSIM

Instant QR deliveryKeep your numberTop up anytime
One plan · 2 countries · see the full list
$3.49USD1 GB · 7 days · $3.49/GB
  • Works on eSIM-capable phones
  • Local partner networks, auto-connect
  • Starts when you land
  • Hotspot & easy top-ups

Your data roams on local partner networks in Japan & South Korea, connecting automatically to the strongest available signal. If one network has no service, it can switch to another.

Coverage is solid 4G/LTE across the major cities and along the main routes between them. In remote and mountain areas, signal is more limited on every network.

Check compatibility
Start enjoying your Japan & South Korea eSIM with prepaid dataUSD ($)

More GB, lower per-GB price: the 10 GB plan works out at $3.00 per GB.

Data plan

Select the GB you need for your trip

One eSIM per orderBuying for a group? Place an order per person.
Total$3.49USD
Buy now

QR by email within minutes · starts when you land

Stay connected no matter what. Running low? Top up the same eSIM in a couple of taps, with no new QR and no reinstall. Install before or during your trip; your plan begins at first connection in Japan & South Korea.

Secure paymentVISAPay₮₿
$3.491 GB · 7 daysBuy now

Where this eSIM works 2 countries

One shared allowance for the whole list. Cross any of these borders and the same plan reconnects on a local partner network.

  • Japan
  • South Korea

Fast and reliable connection

  • Clear video calls with no delays.
  • Share stories in just a few seconds.
  • Enjoy creating video content and super fast uploading.
  • Find your way wherever you go!

The best performance in all your apps

Fast 4G/LTE on local partner networks keeps you connected across Japan & South Korea’s cities. The eSIM connects automatically and can fall back to another network if one has no service.

Get connected in 3 steps

01.

Pick your plan by selecting the GB you need, and pay by card, Apple Pay, Google Pay or crypto.

Check compatibility list
02.

Install your eSIM with the method you like: scan the QR from the email, or use the one-tap install link.

See install methods
03.

Turn on data roaming for the eSIM line. Your plan starts when it first connects to a local network in Japan & South Korea.

Advantages of the Simzora eSIM for Japan & South Korea

Set up before you travel

Buy today, fly whenever

Set up your data at home over Wi-Fi and land already connected in Japan & South Korea. No airport SIM queues, no paperwork, and your own number stays active for calls and OTP codes.

  • No queues
  • No paperwork
  • Prepaid, price upfront

Connected across Japan & South Korea

Local partner networks4G / LTEAuto

Connects automatically and uses whichever network has service where you are.

Keep your WhatsApp number

A data-only second line. Your own SIM stays active for calls and bank OTP codes, and WhatsApp keeps working on your existing number.

Honest per-GB pricing

From $3.49, with lower per-GB rates on the larger plans. Prices include tax, with no hidden fees.

Top up without a new eSIM

Add data to the same eSIM in a couple of taps. No new QR code, no reinstall. Never delete the eSIM; top up instead.

Real-human support

People, not bots, on WhatsApp and email, 7 days a week from 9:00 to midnight (GMT+5), usually replying within 15 minutes.

Share your data with family

Hotspot is supported where the plan allows it: turn your phone into a Wi-Fi network and share with a laptop, tablet or a second phone.

Change of plans? Kept fair

All sales are final since eSIMs deliver instantly, so check your phone first and start small. Ask us before you buy.

Why buy a prepaid eSIM for Japan & South Korea with Simzora?

What you getSimzora eSIMLocal SIM cardHome-carrier roaming
Set up from home, in minutes
No queues, paperwork or biometrics
Price known upfront, prepaid
Keep your own SIM active for calls & OTPs
Works on eSIM-capable phones
Data on local 4G / LTE

General comparison. Local SIMs often require in-person registration; home-carrier roaming rates depend on your operator.

eSIM prices for Japan & South Korea

Standard GB plans and unlimited daily plans. One-time payment, prices include tax.

Standard planValidityPrice
1 GB7 days$3.49
3 GB30 days$10.49
5 GB30 days$16.49
10 GBBest value30 days$29.99
Unlimited planValidityPrice
Unlimited7 days$24.49
Unlimited15 days$51.99
Unlimited30 days$103.49

FUP applies to unlimited plans.

Choosing the Japan & South Korea eSIM

This one is for the two-stop East Asia trip: a week of Tokyo, Kyoto and Osaka, then a short flight across to Seoul or Busan, all on a profile you install once. It covers 2 countries, Japan and South Korea, so it suits itineraries that shuttle between them, a Tokyo work week with a Seoul weekend attached, or a spring trip that finishes on Jeju.

You do nothing at the border. Fly out of Haneda, land at Incheon, and the phone drops its Japanese roaming registration and picks up a Korean partner network on its own, usually within a couple of minutes of leaving Airplane Mode. There is no second QR code to scan and no separate plan to activate, and whatever data you have left carries straight across with you.

Sizing is simple because the standard plans step up cleanly. 1 GB over 7 days at $2.99 suits a short city break that leans on hotel Wi-Fi. 3 GB over 30 days at $8.99 or 5 GB over 30 days at $13.99 cover normal maps, messaging and transit apps in both countries. 10 GB over 30 days at $25.99 is the one to take if you tether a laptop or upload photos daily. All four top up mid-trip.

There is an unlimited option too, 1 GB a day at full speed then unlimited at a reduced speed, at $20.99 for 7 days, $44.99 for 15 and $89.99 for 30. Be honest about the trade-off before you buy: if your trip only touches Japan, or only Korea, the single-country plan is cheaper per gigabyte and sold in sizes above the 10 GB ceiling here. This bundle is worth its premium when you actually cross.

  • Install before departure: the days start at your first connection at Haneda, Narita, Kansai or Incheon, not when you pay, so buying a week early costs you nothing.
  • Keep your home SIM active for bank OTP codes. This line is data-only, with no number and no SMS.
  • Download offline subway maps for Tokyo and Seoul, then let the eSIM handle live directions on the ground.
  • Hotspot works on every plan here, useful for sharing a connection on long Shinkansen or express-train rides.
  • Seeing No Service after landing? Toggle Airplane Mode once so the phone re-selects a local partner network.

Frequently asked questions

Yes. It covers 2 countries, Japan and South Korea, on a single profile with one shared data balance, and the phone switches partner networks by itself when you fly between them. You need an eSIM-capable, carrier-unlocked phone, and nothing else changes at the border.
Maps, messaging, transit apps and light scrolling get most people through two weeks on 5 GB. Take 10 GB if you stream, video call home each night or tether a laptop. Standard plans top up on the same eSIM, so starting smaller costs you nothing.
Full speed covers the first gigabyte each day, then the line continues at a reduced speed until the next day resets. Transit apps, translation and messaging stay usable after the drop; uploading a day of camera-roll photos does not. Unlimited costs $20.99 for 7 days, $44.99 for 15 and $89.99 for 30, and a top-up buys another full period rather than more gigabytes, so unless you expect to pass a gigabyte on most days, 10 GB over 30 days at $25.99 is the cheaper way to buy the same trip.
If you are only visiting one of the two, yes. The single-country plan costs less per gigabyte and comes in sizes above this bundle's 10 GB ceiling. The bundle earns its price when you cross between them and want one profile and one balance.
No. It is a data-only line with no number, so no voice calls and no SMS, including bank verification codes. Keep your home SIM active in the phone for those. WhatsApp, LINE, KakaoTalk and FaceTime work over data on your existing number.

Don’t worry, we’re here for you.

If you have any questions during this process, real people answer on WhatsApp and email, 7 days a week from 9:00 to midnight (GMT+5), usually within 15 minutes.

Let’s talk