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Japan & South Korea eSIM
A 5 GB Japan & South Korea eSIM costs £12.99 for 30 days across 2 countries with 5G. Plans start at £3.99 for 1 GB. Delivered by email in seconds.
One eSIM can carry you from Japan to South Korea. Start in Tokyo, Osaka or Kyoto, explore, then fly on to Seoul or Busan on the same eSIM. No SIM card to swap, and no hunting for a shop. Just choose the plan that matches your days.
- 5G and 4G
- 2 countries on one eSIM
- Top up anytime
- Instant email delivery
Your Japan & South Korea eSIM in two questions
Which Japan & South Korea eSIM plan fits my route?
Two countries, one plan: your route through Japan and South Korea and your number of days decide which plan to pick.
- A 3-day Tokyo and Seoul hop, light use: Pick 1 GB for 7 days, which covers maps and messages as you go from Haneda (HND) to Incheon (ICN).
- A 7-day trip, standard use: Land at Kansai (KIX), see Kyoto and Osaka, then leave from Gimhae (PUS). Pick 5 GB for 30 days for social media, music and some video.
- A 14-day trip, heavy use: Start in Tokyo, go on to Hokkaido, then finish in Seoul. Pick 1 GB a day for 30 days, which suits streaming and hotspot use.
- Japan only: If every night is in Japan, the Japan eSIM is built for that trip.
All 41 Japan & South Korea eSIM plans
Prices include any taxes. Price per GB shown so you can compare at a glance.
| Data | Valid for | Price | Per GB | Top-up | Buy |
|---|---|---|---|---|---|
| 1 GB · 7 days | £3.99 / €4.99 / $4.99 | £3.99 / €4.99 / $4.99 | Choose | ||
| 3 GB · 15 days | £6.99 / €8.99 / $8.99 | £2.33 / €3.00 / $3.00 | Choose | ||
| 3 GB · 30 days | £7.99 / €9.99 / $9.99 | £2.66 / €3.33 / $3.33 | Choose | ||
| 5 GB · 30 days | £12.99 / €14.99 / $15.99 | £2.60 / €3.00 / $3.20 | Choose | ||
| 10 GB · 30 days | £23.99 / €28.99 / $30.99 | £2.40 / €2.90 / $3.10 | Choose | ||
| 20 GB · 30 days | £41.99 / €49.99 / $53.99 | £2.10 / €2.50 / $2.70 | Choose |
2 countries on one eSIM
Cross borders without changing anything: your eSIM switches to the local network in each country by itself.
| Country | Networks | Speed |
|---|---|---|
 Japan | KDDI/au, SoftBank | 5G |
 South Korea | LG Uplus, SKTelecom | 5G |
Good to know
- Data only: your own number keeps working for calls and texts
- Hotspot works where your phone and the network allow it
- Plans start when you first connect; install within 180 days
- Your data routes through Singapore, so some sites may show that country
- Top up the same eSIM any time, no new QR code
Which countries and networks does the Japan & South Korea eSIM cover?
Japan and South Korea share one eSIM, so a trip that hops between the two needs only one install. Two countries, and both have 5G.
- Japan: Tokyo, Kyoto and Osaka, on KDDI/au and SoftBank.
- South Korea: Seoul and Busan, on LG Uplus and SKTelecom.
Your phone switches network by itself when you cross from one country to the other, so there's nothing to tap. Japan's cities and main rail routes are well covered, but signal can drop in the mountains and remote rural areas. Your data reaches the internet through Singapore, a normal setup for travel eSIMs. See why your internet address shows Singapore.
How much data do you need in Japan & South Korea?
Light: maps, messages, email (about 0.25 GB a day). Standard: plus social, music, some video (about 0.7 GB a day). Heavy: plus streaming, video calls, hotspot (about 1.8 GB a day).
3 days
- Light · about 800 MB1 GB · 7 days · £3.99 / €4.99 / $4.99
- Standard · about 2 GB3 GB · 15 days · £6.99 / €8.99 / $8.99
- Heavy · about 5 GB1 GB a day · 7 days · £10.99 / €12.99 / $13.99
7 days
- Light · about 2 GB3 GB · 15 days · £6.99 / €8.99 / $8.99
- Standard · about 5 GB1 GB a day · 7 days · £10.99 / €12.99 / $13.99
- Heavy · about 13 GB1 GB a day · 15 days · £15.49 / €18.49 / $19.99
14 days
- Light · about 4 GB5 GB · 30 days · £12.99 / €14.99 / $15.99
- Standard · about 10 GB1 GB a day · 15 days · £15.49 / €18.49 / $19.99
- Heavy · about 25 GB1 GB a day · 30 days · £30.49 / €36.49 / $39.99
30 days
- Light · about 8 GB10 GB · 30 days · £23.99 / €28.99 / $30.99
- Standard · about 21 GB1 GB a day · 30 days · £30.49 / €36.49 / $39.99
- Heavy · about 54 GB2 GB a day · 30 days · £63.99 / €76.99 / $83.49
How to set up your Japan & South Korea eSIM
Install at home
On Wi-Fi, tap Install on iPhone (iOS 17.4+), scan the QR code, or type the two codes from your email.
Switch on when you land
Turn on your eSIM line, choose it for mobile data and switch Data Roaming on for that line.
You're online
Your phone joins KDDI/au and your plan starts. Check data left on your eSIM page.
Using one eSIM across Japan & South Korea: tips
Hopping between Japan and South Korea? This bundle covers both countries on one eSIM, so the same plan goes with you from Tokyo to Seoul.
- Install at home: Set up your eSIM before you fly, then keep data roaming switched on for the eSIM line at every border.
- Apps that matter: In Japan, GO, Uber and DiDi handle rides, and LINE is the messaging app to have. In South Korea, use Kakao T or Uber for rides and KakaoTalk for messages. Naver Map and KakaoMap give walking and transit directions where Google Maps can't.
- Home number: Keep your home number for calls and texts, and check how WhatsApp works with it before you go.
- Sign-ups: Many Korean apps ask for a local phone number to sign up, which your eSIM may not provide, so plan for that.
- Top up mid-trip: Every plan can be topped up, so you can add data on the road if you need more.
Japan & South Korea eSIM questions
How much is an eSIM for Japan & South Korea?
Japan & South Korea eSIMs start at £3.99 for 1 GB over 7 days. A 5 GB plan for 30 days costs £12.99. Prices include any taxes and show in pounds, euros or dollars.
Which countries does the Japan & South Korea eSIM cover?
One eSIM works in all 2 countries: Japan and South Korea. The full list with the network in each country is on this page.
When does my Japan & South Korea eSIM start?
Most plans start the moment your eSIM first connects to a network in Japan & South Korea, so you can buy and install it at home before you fly. Install it within 180 days of buying.
Can I top up my Japan & South Korea eSIM?
Yes. Most Japan & South Korea plans can be topped up from your eSIM page in two taps, with no new QR code. The plan table on this page shows which ones.
Does it come with a phone number?
Every eSIMology plan is data only. Keep your own SIM switched on for calls and texts, and use WhatsApp, FaceTime or any calling app over your eSIM's data.
What if my plans change?
Cancel an eSIM you haven't installed within 30 days for a full refund to your card, in two taps from your eSIM page.
Does the Japan & South Korea eSIM work in Japan?
Yes. Japan is one of the two countries on this eSIM, with KDDI/au and SoftBank as its main networks. Okinawa and Hokkaido are part of Japan too, so the same eSIM applies there.
Can I use one eSIM for Japan and South Korea?
Yes, one eSIM covers both countries, so you don't need a second one when you move between them. Fly from Kansai (KIX) to Incheon (ICN) and you simply keep using the same eSIM.
Is there 5G on the Japan & South Korea eSIM?
Yes, both Japan and South Korea have 5G on this eSIM. Your phone needs 5G support to use it, and you can check the network type shown in its settings.
Which maps should I use in South Korea?
Naver Map and KakaoMap give walking and transit directions where Google Maps can't, so they're worth having on your phone. Both run on your mobile data, so keep it switched on.
Can I book rides in Japan and South Korea with this eSIM?
Yes. In Japan, GO, Uber and DiDi are the ride apps to try, and in South Korea it's Kakao T and Uber. Each needs mobile data to request a car, so keep data on as you travel.
Can I message people in Japan and South Korea with this eSIM?
Yes. Messaging apps run on your mobile data, so you can send messages and photos from your eSIM. In Japan, the messaging app to get is LINE, and in South Korea it's KakaoTalk.
Can I sign up to Korean apps with this eSIM?
Not always. Many Korean apps ask for a local phone number to sign up, which a travel eSIM may not provide. If an app asks for one, check whether it offers another way to register.
Ready for Japan & South Korea?
Buy now, install today, and your plan waits until you land. Full refund if not installed.