2 countries, one eSIM

eSIM for Japan & South Korea

Travel across 2 countries with a single eSIM. Cross borders without swapping SIMs or paying roaming fees.

5G where available
Instant QR delivery
Top up anytime
No contracts

Japan & South Korea plans from

$3.49

USD · taxes and fees included

Plans available: 6
Validity: Up to 30 days
Network: KDDI/au 5G, SKTelecom 5G

See plans

Install now, activate when you land.

Choose the data and days for your trip

Every plan works on local networks across Japan & South Korea.

Best match

Quick Trip

Essential

3 GB

30 days

$7.49

$2.50 per GB

Get plan

Long Haul

Best value

5 GB

30 days

$10.49

$2.10 per GB

Get plan

Getaway

Japan & South Korea eSIM details

Networks: KDDI/au 5G, SKTelecom 5G, LG Uplus 5G
Speed: Up to 5G, no throttling on data plans
Plan starts: When you first connect at your destination
Install within: 180 days of purchase
Top-ups: Add data anytime from your account
Validity: Plans from 1 to 30 days
IP location: SG
Support: Real humans, 24/7

Countries covered

One Japan & South Korea eSIM works in all 2 destinations below.

Japan
South Korea

Staying in one country?

Country plans can be cheaper if you only visit one place.

All destinations

How it works

Step 1 of 4

Choose your destination

Search for the country or region you're visiting. Every plan shows real local networks and speeds.

9:41

Where to?

Search destinations

Francefrom $3.49
Japanfrom $4.49
United Statesfrom $3.99
Thailandfrom $3.99

Japan & South Korea eSIM FAQs

Common questions about using a travel eSIM in Japan & South Korea.

Visit the help center

Will my eSIM work as soon as I land in Japan & South Korea?

Yes. Install your eSIM before you fly, then turn on your Roamledge line and data roaming when you arrive. You'll be online within a minute of landing.

Which networks will I use in Japan & South Korea?

Your plan connects to KDDI/au 5G, SKTelecom 5G, LG Uplus 5G. Your phone picks the strongest available signal automatically.

Can I keep my WhatsApp and phone number?

Yes. Your home SIM stays in your phone for calls and SMS, and WhatsApp keeps your usual number. Roamledge only provides the mobile data.

What if I need more data in Japan & South Korea?

Top up the same eSIM from your Roamledge account in a few taps — no new QR code needed. We'll also email you before your data runs low.

Is my phone compatible?

Most phones from 2019 onwards support eSIM, including iPhone XS and newer, Google Pixel 3 and newer and recent Samsung Galaxy models. Your phone must be carrier-unlocked.

Travel eSIM for Japan & South Korea

A Roamledge eSIM for Japan & South Korea gives you prepaid mobile data without roaming charges or a physical SIM card. Buy online, install in minutes and connect to local networks as soon as you arrive.

Choose from 6 plans for Japan & South Korea, starting at $3.49. Pick a ready-made plan or build your own with the exact data and days you need — you only pay for what your trip requires.

Your eSIM arrives by email with a QR code and one-tap install links for iPhone and Android. Keep your regular SIM for calls and messages while Roamledge handles your data on KDDI/au 5G and SKTelecom 5G.

Need more data during your trip? Top up from your account at any time. Questions before you buy? Our support team is available around the clock.