How to Buy a Japan eSIM Before Arrival

BEFORE YOU FLY

Buy Your eSIM Before Traveling to Japan

Buying a NINJA TRAVEL eSIM before departure gives you time to check device compatibility, compare data plans, and receive the activation details before you actually need mobile data in Japan.

When you arrive in Japan, just complete the required network settings and your mobile data connection will be effortless.

Prepare Before Your Flight

Choose your plan and install your eSIM before departure.

Getting connected after arriving in Japan

Get Connected on Arrival

Choose your plan and install your eSIM before departure.

No physical SIM card or WiFi pickup required

No Physical Pickup Required

No physical SIM card or WiFi device to collect at the airport.

HOW TO BUY

How to Buy a NINJA TRAVEL eSIM

STEP 01

Choose Your eSIM Plan

Start by choosing the data amount or unlimited plan that fits your trip. A light traveler may only need a smaller plan for maps and messages. A traveler using the connection for video calls, uploads, tethering, or remote work should choose more data.

If you are not sure which plan fits, review Japan eSIM Data Plans & Pricing before purchase.

STEP 02

Complete Your Order Online

Access the NINJA WiFi eSIM order page, enter the required information, and review the selected plan, usage date, number of devices, and total price before payment.

STEP 03

Receive a QR Code with Instructions

Instructions for issuing the activation QR code are sent to the email address registered with your order. Your dedicated QR code will be sent within 24 hours after the order is confirmed.

Keep the email accessible on another device or in a place you can open while setting up your phone.

STEP 04

Install the eSIM with a Stable Internet Connection

After receiving the activation information, follow the instructions provided with your order. Keep the email accessible and use a stable internet connection during setup.

Before installing, make sure to confirm:

Your phone supports eSIM
Your phone is unlocked
You can access the setup email or QR code
You know whether you are setting up on iPhone or Android

STEP 05

Activate and Connect in Japan

When you are ready to connect, select the NINJA WiFi eSIM for mobile data and complete the device-specific settings. iPhone and Android require different setup steps. On iPhone, turn on the connection and enable data roaming. On Android, APN settings are required.

Learn how to use an eSIM in Japan

COMPARE YOUR OPTIONS

Buying an eSIM Online
vs After Arriving in Japan

Choose the timing that works for your trip.
Preparing before departure means less to do when you arrive.

TimingAdvantagesCaution

Before arrivalMore time to check compatibility and plan choiceFollow the activation timing provided with your order. Validity conditions may differ by plan.

After arrivalUseful if travel plans changedYou need internet access to complete purchase and setup.

READY TO GO?

What You Need
Before Buying an
eSIM

Start with your trip style, then choose the closest data range.

Prepare these items before purchase:

An eSIM-compatible phone
An unlocked phone
A valid email address
A credit card accepted by NINJA WiFi
A stable internet connection for purchase and setup
Enough battery to complete setup

Apple advises that iPhone XS, iPhone XS Max, iPhone XR, or later can support eSIM, depending on country or region restrictions. Android compatibility varies by model and manufacturer, so please check your device before purchase.

GOOD TO KNOW

Common Purchase Mistakes to Avoid

01

Do not buy before checking whether your phone is unlocked. A locked phone may not accept another provider's eSIM.

02

Do not rely on a single phone screen. If your setup requires scanning a QR code, it must be displayed on another device.

03

Do not assume all unlimited plans have no usage conditions. Review the latest plan details before purchase.

04

Do not delete the installed eSIM while you still need the service. If you cannot complete setup or need to reinstall it, contact NINJA WiFi support before removing the profile.

FAQ

FAQ About Buying an eSIM for Japan

Can I buy a Japan eSIM from the United States?

AYes. You can buy online before your trip. Make sure your phone supports eSIM and is unlocked before you purchase.

Where do I get the activation information?

A1GB can work for very light use, but it is not ideal for streaming, video calls, uploads, or tethering. If you rely on mobile data daily, choose more data.

Can I buy an eSIM after arriving in Japan?

AYes, but you will need temporary internet access to complete the order and setup. Buying before arrival gives you more time to check compatibility and prepare the setup details.

Do I need to pick up anything at the airport?

ANo physical pickup is needed for eSIM. If you prefer a physical device or shared connection, consider a Pocket WiFi instead.

What if my phone does not support eSIM?

AChoose another internet option such as a physical SIM card or Pocket WiFi. You can compare options in eSIM vs Pocket WiFi in Japan.

USER GUIDES

Explore NINJA Travel eSIM Guides

Compare available plans, learn how to
purchase and use an eSIM,
or compare eSIM with Pocket WiFi before
your trip to Japan.

NINJA Travel eSIM Overview

Learn how NINJA WiFi eSIM works, review the available options, and find information you need for your trip to Japan.

View eSIM Overview

Japan eSIM Plans

Compare data amounts and unlimited options based on your expected usage and trip length.

View eSIM Plans

How to Use an eSIM in Japan

Review the general setup steps for compatible iPhone and Android devices and learn what to check before connecting in Japan.

View Setup Steps

eSIM vs Pocket WiFi in Japan

Compare device requirements, sharing, charging, pickup, return, and backup needs.

Compare Options