Guide

How to set up an eSIM in Japan (iPhone & Android)

If you are moving to Japan (work/study) or just arrived, an eSIM can be a simple way to get mobile data quickly without visiting a store.

It can also be a good short-term option while you compare local contracts, or as a secondary data SIM alongside your main number.

Install the eSIM over Wi-Fi before you travel, then enable mobile data after arrival. Below is a practical setup checklist for iPhone and Android.

Currently there are 43 eSIM plans available for Japan priced from 1,00 EUR – 41,50 EUR, data: 100 MB – 50 GB (4G/5G network).

Buy eSIM for Japan

Table of contents

Before you start

  • Make sure your phone supports eSIM and is carrier-unlocked.
  • Have Wi-Fi available for installation.
  • Keep the QR code / activation details ready.
  • You can keep your main SIM active for calls/SMS and use the eSIM for data.
  • Many travel eSIM plans are data-only. If you need calls/SMS, keep your main SIM active (and check plan details).

iPhone: add the eSIM

Go to Settings → Cellular → Add eSIM and scan the QR code. Name the eSIM (e.g. “Travel”).

Set the eSIM as your Mobile Data line while you are in Japan.

Android: add the eSIM

Open Settings → Network & internet → SIMs → Add eSIM. The exact path may differ by device (Samsung/Pixel/etc).

Scan the QR code and set the eSIM as the data SIM.

APN and mobile data settings

APN is usually configured automatically. If data does not work, check APN/network selection and try toggling Airplane mode or restarting the phone.

Hotspot / tethering

In many cases you can share data via hotspot. If it does not work, check hotspot settings and any plan limitations.

If the eSIM has no internet: quick checks

  • Is the eSIM selected as the Mobile Data line?
  • Are Mobile Data enabled for the eSIM?
  • Network selection set to Automatic and you have signal?
  • Toggle Airplane mode on/off or restart the phone.
  • If needed, enable Data Roaming for the eSIM line.

Which plan should you choose?

For a 5–7 day trip, a smaller plan is often enough; for 10–14 days, a mid-sized plan is usually more comfortable.

See available options here: eSIM for Japan.

If you will travel across multiple countries, JP,KR eSIM may be a better fit.

When to activate

Install the eSIM at home over Wi-Fi — this way you're ready before the trip. Enable mobile data after landing.

Who benefits from eSIM in Japan

  • short-trip tourists (3–5 days)
  • business travelers
  • families who need internet for navigation and staying connected

Device compatibility

Before buying eSIM, make sure your phone is not carrier-locked (SIM-lock). An unlocked phone is required for eSIM to work.

Cost planning for Japan

eSIM package cost depends on the region, data volume, and validity period. One-time purchase with no subscription — you pay only for what you use. Compare packages before buying, paying attention to cost per gigabyte.

Connectivity on the ground: Japan

Many museums, parks, and attractions offer audio guides and interactive maps through mobile apps. Stable internet via eSIM makes visits more comfortable.

Useful links

Official sources on mobile networks and roaming:

Quick recommendation

To stay connected in Japan, choose eSIM for Japan in advance.

If you travel across multiple countries in the region, JP,KR eSIM can be a good fit.

Recommended plans

eSIM for Japan JP,KR eSIM Global eSIM – 140 countries

Summary

Choose eSIM for Japan so you can get online quickly after arrival.

FAQ

Can I install an eSIM before I travel?

Yes. Install it over Wi-Fi in advance and enable mobile data after arrival.

Can my main SIM stay active?

Yes. You can keep your main SIM for calls/SMS and use the eSIM for data.

What if there is no internet?

Check that the eSIM is selected for mobile data, toggle Airplane mode, restart the phone, and (if needed) enable data roaming for the eSIM line.

How much does an eSIM cost for Japan?

Prices: 1,00 EUR - 41,50 EUR. Total data: up to 50 GB. Daily cap: 500 MB - 10 GB/day. Validity: up to 180 days. Operators (for reference): NTT Docomo, au (KDDI), SoftBank, Rakuten Mobile.

Which validity periods are most common?

Common options: 1 day, 7 days, 30 days.