Japan & South Korea eSIM
Mobile data in Japan & South Korea. No roaming fees, instant activation, one-tap install on iPhone, Samsung and Android.
- 01Internet on arrival
- 02No SIM swap — keep your number
- 03Set up in under a minute, before you fly
Choose Your Unlimited Plan
- 3G/4G/5G network speeds
- Top-up anytime if needed
- Instant Activation · Hotspot Sharing
- 24/7 Support · No Contracts
- 1 GB high speed per 24 hours
- Unlimited data (min. 512 Kbps after high-speed)
- 3G/4G/5G · Instant activation · Hotspot sharing
- 24/7 Support · No Contracts
All Japan & South Korea eSIM plans and prices
| Data | Valid | Price | Per GB |
|---|---|---|---|
| 1 GB a day | Unlimited daily | $2.49 / day | — |
| 2 GB a day | Unlimited daily | $4.49 / day | — |
| 3 GB a day | Unlimited daily | $5.99 / day | — |
| 5 GB a day | Unlimited daily | $7.49 / day | — |
| 10 GB a day | Unlimited daily | $12.99 / day | — |
Which Japan & South Korea eSIM plan should I pick?
-
Streaming and hotspot every day
Unlimited daily
from $2.49 / day
How it works
- Step01 Choose Plan Pick the data and validity that fit your trip.
- Step02 Receive Order Email Your eSIM arrives by email straight away.
- Step03 Install in one tap Tap install, then switch on data when you land.
Coverage
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Japan
KDDI/au 5G, SoftBank 5G
-
South Korea
SKTelecom 5G, LG Uplus 5G
Need more coverage?
Common Questions
How does an eSIM help with sightseeing in Japan & South Korea?
You roll your suitcase through Haneda Airport arrivals and open Google Maps for the train route into Tokyo, passing the SIM counter instead of joining its queue. The route shows your platform and transfer, so you head straight for the ticket machines. In Asakusa, you follow the map toward Senso-ji, then duck into a small restaurant where Google Translate helps you read the specials on the wall.
After lunch, you book admission to Tokyo Skytree and pull up the confirmation as you walk toward the entrance. You send a photo of the skyline home through LINE, then use Uber to arrange a ride back to your hotel. When you would rather eat in than head out again, you browse Uber Eats and choose dinner without leaving your room.
What should tourists compare in an eSIM for Japan & South Korea?
For a Japan & South Korea itinerary, look for one regional package covering both countries, clear allowance renewal terms, and validity that matches your booking. This plan covers Japan & South Korea, so crossing between them does not require buying a separate country plan.
The allowance is recurring, not one shared pool for the entire trip. The data amount and validity depend on the package you choose. Compare those details in the plan picker, along with your device’s eSIM compatibility and whether it is unlocked for use with another provider. If you need a further allowance beyond your purchase, buy a new plan.
Where is eSIM coverage strongest across Japan & South Korea?
Your eSIM connects to supported local networks including KDDI/au, SoftBank, SKTelecom, LG Uplus, with 3G/4G/5G service across Japan & South Korea. Coverage is strongest in cities and main tourist areas such as Tokyo, Kyoto, Osaka, Seoul and Busan. Connections are patchier in the Japanese Alps, on remote Japanese islands and in South Korea’s mountain interiors, where terrain separates settlements and transport routes.
| SimSwift eSIM | Local SIM | Roaming | |
|---|---|---|---|
| Setup | Install at home before flying | Find a shop or airport kiosk and queue after landing | Nothing to install; enable roaming |
| When you're connected | On landing when connected to a supported network | After purchase and setup | On landing if your home plan includes destination roaming |
| Paperwork / ID | No paperwork or ID submission | ID may be requested at the counter | Existing home account; no new registration |
| Cost predictability | Pay once upfront | Choose from local offers after arrival | Included allowance or additional charges depend on your home plan |
| WhatsApp & your number | Keep using WhatsApp on your home number | New local number; WhatsApp stays on your home number | Your home number, on your home plan's roaming terms |
| Top-ups | Buy a new plan if you need more data | Purchase another allowance through the provider or a shop | Extra data depends on your home plan |
What phone essentials should I pack for Japan & South Korea?
- Download NAVER Map before exploring South Korea; save your accommodation in the app so you can find it without retyping the address.
- Save offline Google Maps areas for Japan, plus screenshots of station exits and hotel directions.
- Pack an adapter for Japan’s Type A sockets and South Korea’s Type C or F sockets; check your charger supports both voltages.
- Carry a physical payment card and cash in Japan & South Korea; do not rely entirely on a mobile wallet.
- Keep your phone silent on trains in Japan and South Korea, and move aside before stopping to study directions.
- Carry a charged power bank for photographing Kyoto’s temples or navigating Seoul’s steep neighbourhood streets.
How much does a Japan & South Korea eSIM cost?
SimSwift Japan & South Korea unlimited daily plans start at $2.49 a day.