海外旅行におすすめのeSIM完全ガイド

A complete guide to eSIMs recommended for overseas travel | A thorough explanation of how they work, how to purchase them, capacity, how to set them up, and more!

Back to blog

Now that internet access is essential when traveling abroad, "eSIM" is gaining attention for its hassle-free and convenient use.
This article provides a clear explanation of the benefits of eSIM, recommended services, and how to set it up.

We're sure you'll find the eSIM that's right for you!

1. What is eSIM? Explaining the difference between eSIM and conventional SIM

What is a SIM card?

It's like an "identification card" that a smartphone needs to connect to a telecommunications carrier's network.

【function】
Records phone numbers, contract information, and network connection information.

【shape】
Evolution from standard SIM → MicroSIM → nanoSIM.
It is inserted into your smartphone as a physical card.

What is eSIM?

An eSIM (embedded SIM) is an electronic SIM card built into a smartphone.

【function】
The same information as a conventional SIM is stored digitally.

【Features】
It does not use a physical SIM card, but works on a chip inside the smartphone.
You can switch your carrier information online.

The difference between traditional SIM cards and eSIMs

Features Traditional SIM card eSIM
shape Requires a physical card Built-in electronic chip
Effort to change You need to replace the SIM card You can change the settings on your smartphone
Supported Devices Compatible with most smartphones You need an eSIM-compatible smartphone
Ease of use Need to purchase or replace local SIM Easily change your plan using the app
Safety features There is a risk of loss or theft No risk of loss

A detailed explanation of how eSIM works

How does eSIM work?
A system in which the telecommunications carrier's network information is written into a chip built into the device.
Information can be downloaded and activated via QR code or app.

What can you do with eSIM?
You can switch between plans from multiple carriers.
Download eSIM plans from local carriers while traveling abroad.
Some devices can store multiple profiles and switch between them depending on the usage.

2. Why choose an eSIM for international travel?

1. Easy and quick setup

Get ready before your trip!
An eSIM is a system that digitally downloads a data plan onto a chip installed in a smartphone.
Simply purchase a plan on the app or website, scan the QR code and you're set.
Save time by purchasing a SIM card or renting mobile Wi-Fi at the local airport.

Avoid trouble on-site!
Purchasing a data plan in-store can be difficult if you are not familiar with the local language.
With an eSIM, you can complete the setup in advance, so you can connect to the internet as soon as you arrive at your destination.

2. It reduces costs

It's often more cost-effective than local SIMs or roaming!

Traditional roaming plans are often expensive and there is a risk of incurring unexpected costs if you use them too much.
On the other hand, eSIMs are seeing increased competition among carriers, resulting in more affordable plans, especially for short trips.

3. Flexible plans based on data volume

You can freely choose a plan based on the amount of data you want and the period of use.

  • Europe 40 Regions-eSIM

    1GB per day x 7 days 2,440 yen
    3GB per day x 5 days 3,900 yen
    5GB/7 days 1,480 yen
    10GB/7 days 3,020 yen

    And more…

    Purchase here 
  • 韓国-eSIM

    Korea eSIM

    1GB/5 days 540 yen
    3GB/7 days 1,040 yen
    5GB/30 days 1,780 yen
    10GB/30 days 3,080 yen

    And more…

    Purchase here 
  • 台湾-eSIM

    Taiwan eSIM

    500MB per day x 3 days 720 yen
    500MB per day x 5 days 1,060 yen
    1GB per day x 3 days 1,220 yen
    1GB per day x 5 days 1,860 yen

    And more…

    Purchase here 

4. You carry less stuff

No need for mobile Wi-Fi <br/>Mobile Wi-Fi requires you to worry about battery life and increases the hassle of having to carry it around.
Furthermore, if multiple people are using the same network, the communication speed may slow down.

With an eSIM, the smartphone itself functions as a communications device, allowing you to carry less luggage.

5. High safety

No need to use free Wi-Fi <br/>Free Wi-Fi offered at cafes and hotels overseas poses the risk of communications being intercepted and personal information being leaked.
Using an eSIM ensures secure mobile data communication.

No risk of physical theft <br/>Traditional SIM cards are at risk of being lost or stolen.
On the other hand, eSIM information is stored inside the smartphone, so there is no need to worry about it being physically stolen.

6. Dual SIM for even more convenience

Many eSIM-enabled smartphones have dual SIM functionality, meaning you can use a physical SIM and an eSIM at the same time.
Set the eSIM for data communication when traveling abroad, and keep the physical SIM for calls and SMS (keeping your Japanese number).
This allows you to flexibly use different communication methods.

7. Flexibility for use around the world

Available in many countries and regions
eSIMs have a wide coverage area and there are also plans that cover multiple countries with a single profile.

Smooth international travel <br/>When traveling to multiple countries, such as Europe or Southeast Asia, you'll no longer have to purchase a SIM card for each country.
eSIM is convenient because you can cover a wide area with just one plan.

Examples of choosing eSIM

フィリピン-eSIM

Case 1: Travel to Cebu Island (7 days)

[Data volume]
3GB (mainly for maps and social media while traveling)
[Plan]
Philippines eSIM
3GB/7 days 1,040 yen

[Convenience]
You can start using the internet as soon as you arrive at your destination. No Wi-Fi required.

Philippines eSIM

Case 2. Europe tour (14 days)

[Data volume]
10GB

[Plan]
Tour: 40 regions of Europe
10GB/15 days 3,080 yen

[Convenience]
It can be used as is without any settings even across multiple countries.

Europe Travel eSIM

There are many reasons to choose an eSIM when traveling abroad, including convenience, cost savings, lighter luggage, safety, and flexibility .
eSIM is an ideal choice, especially for those who want to reduce stress while traveling and ensure a comfortable internet environment.

3. How to purchase and set up an eSIM

How to buy

  • 1. Select your country/region

  • 2. Choose a data plan

  • 3.Payment by electronic money or credit card

  • 4. Scan the QR code to install the eSIM

  • 5. Connect to the Internet

1 5

4. List of eSIM-compatible smartphones and how to find them

List of devices that can use eSIM

How to check on your device

How to check if your device supports eSIM

1. On the call screen, dial "*#06#"

2. If EID is displayed, it is available.

Please also check whether the SIM lock is removed.

How to check and unlock SIM lock

How to check SIM lock

For iPhone:

  1. Open "General" from the Settings app
  2. Open "Info"
  3. Check the "SIM lock" listed at the bottom.
    If the SIM is locked, you will need to unlock it.

For Android...

  1. From the settings screen, open "Device Info"
  2. Open "SIM Status"
  3. Check the "SIM lock status".
    If it says "Allowed", the SIM is unlocked.

If you are unable to confirm using the above method, we recommend that you check with the store.

How to unlock the SIM

In the case of au...

You can do this yourself through My au, or at an au shop.

To cancel via My au...

  1. Check the IMEI number of your device using one of the following methods: ● Enter "*#06#" on the dialing screen ● For android, go to Settings > About phone > Status ● For iPhone, go to Settings > General > About
  2. Access the My au SIM unlock availability page, enter your IMEI number, and click "Determine"
  3. If the result is "〇", click on the "Proceed here" link to proceed.
  4. Check that the displayed phone number and model name are correct, then click Select.
  5. Enter the 4-digit PIN you set when signing up and click Next.
  6. Check the boxes for notes and reasons for cancellation, then click "Apply with these details" to complete the process.

In the case of Docomo...

You can do it yourself via docomo online, at a docomo shop (free for up to two devices per person), or over the phone.
* Models manufactured before May 2015 can only be unlocked at a Docomo shop.

To unlock the SIM lock using docomo online...

  1. Check the IMEI number of your device using one of the following methods: ● Enter "*#06#" on the dialing screen ● For android, go to Settings > About phone > Status ● For iPhone, go to Settings > General > About
  2. Access My docomo
  3. Click on Docomo Online Procedures and proceed to "SIM Unlock → Procedure"
  4. Enter your ID and password to log in to My Docomo
  5. Enter your IMEI number and click "Next"
  6. Check the notes and click "Complete the procedure" to complete the application.

In the case of Softbank...

You can do it yourself through My Softbank, or you can have it done at a Softbank shop.

To unlock the SIM using My Softbank...

  1. Check the IMEI number of your device using one of the following methods: ● Enter "*#06#" on the dialing screen ● For android, go to Settings > About phone > Status ● For iPhone, go to Settings > General > About
  2. Access My SoftBank and log in with your mobile phone number and password.
  3. For PC, go to the tab to check and change your plan/options > Procedures for models eligible for SIM unlocking. For smartphones, go to check and change your contract > Procedures for models eligible for SIM unlocking.
  4. Enter your IMEI number and click Next.
  5. Check the notes and click "Cancel"
  6. Click "See how to unlock your SIM" and follow the instructions to complete the process.

5. Frequently Asked Questions

What is the shortest time it will take to use an eSIM?

Basically, after scanning the QR code and setting it up, you can start using it right away.

Can I use tethering (internet sharing)?

Yes, you can.
When using this service, please enable the tethering function in your device's settings.

Can I use the phone or social media?

Our eSIM is for data communication only.
Regular calls and SMS cannot be made using this phone number.
However, you can make calls using VoIP apps such as LINE and Skype.

If I travel abroad multiple times, can I purchase a new plan each time?

Of course it is possible.
Our eSIM data communication service is a completely prepaid type, so you can use it each time you travel by simply purchasing a new data plan from the website.
There is no charge for the period you do not use the service.

See other FAQs

Great value eSIMs on sale now!

View all