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Dot Magazine > Blog > E-SIM > How to Activate eSIM and Best eSIM in Japan: A Complete Guide
E-SIM

How to Activate eSIM and Best eSIM in Japan: A Complete Guide

By Andrew October 16, 2025 13 Min Read
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In today’s digital age, staying connected while traveling is more important than ever. Whether you’re traveling for business or pleasure, a reliable mobile connection is essential. Traditional SIM cards are quickly being replaced by eSIMs (embedded SIMs), offering a more efficient and flexible way to stay connected without the hassle of swapping physical SIM cards. If you’re wondering how to activate eSIM and which are the best eSIM providers in Japan, you’ve come to the right place.

Contents
What is eSIM Technology?Key Advantages of eSIM:Why is eSIM Ideal for Travelers?Step 1: Ensure Your Device Supports eSIMStep 2: Get an eSIM Activation QR CodeStep 3: Open eSIM Settings on Your PhoneFor iPhone:For Android:Step 4: Confirm ActivationBest eSIM Providers in Japan1. Airalo eSIMFeatures:Best For:2. Ubigi eSIMFeatures:Best For:3. GigSky eSIMFeatures:Best For:4. Japan SIM FreeFeatures:Best For:5. Docomo eSIMFeatures:Best For:ConclusionFAQs

This comprehensive guide will walk you through everything you need to know about activating your eSIM and choosing the best eSIM options while traveling to Japan. From understanding eSIM technology to the top providers in Japan, we’ve got you covered.

What is eSIM Technology?

Before we dive into how to activate eSIM on your device, it’s important to understand what eSIM technology is and why it has become so popular.

An eSIM is a digital SIM that allows you to activate a cellular plan without the need for a physical SIM card. Unlike traditional SIM cards, which are inserted into a phone, an eSIM is embedded directly into your device’s hardware. This means you can switch networks, manage multiple phone numbers, and even use different providers without physically changing the SIM card.

Key Advantages of eSIM:

  • No Physical SIM Needed: No more dealing with small, fragile SIM cards.

  • Multiple Profiles: eSIM supports multiple profiles, so you can have more than one mobile plan on the same device.

  • Seamless Switching: Switching between networks is as simple as a few taps on your phone, without the need for a SIM card swap.

  • Space-Saving: eSIM technology frees up space in your device for other components.

Why is eSIM Ideal for Travelers?

For travelers, eSIM technology is a game-changer. You can stay connected on international trips without worrying about losing your local SIM card or paying expensive roaming charges. Simply activate an international plan through your eSIM provider, and you’re good to go. With eSIMs, there’s no need to buy a new SIM card every time you travel.

How to Activate eSIM on Your Phone

Activating eSIM is a straightforward process. Below are the general steps to activate eSIM on your device. However, please note that the exact process might vary slightly depending on your device and carrier.

Step 1: Ensure Your Device Supports eSIM

Before you can activate eSIM, you need to make sure your phone supports eSIM. Most modern smartphones, such as the iPhone 12 and later, Google Pixel 4 and later, and newer models of Samsung Galaxy, support eSIM. To check if your phone supports eSIM, refer to your device’s user manual or check with your carrier.

Step 2: Get an eSIM Activation QR Code

To activate an eSIM, you will need an eSIM activation QR code from your mobile provider. This can usually be obtained in one of the following ways:

  • Carrier Website: Many carriers provide an eSIM activation code on their websites.

  • Carrier App: Some carriers offer an app where you can generate your eSIM QR code.

  • Retail Store: Visit a carrier’s retail store to get your eSIM QR code.

  • Customer Support: Call customer service to request your QR code.

Step 3: Open eSIM Settings on Your Phone

Once you have the eSIM activation QR code, follow these steps to activate eSIM on your device:

For iPhone:

  1. Go to Settings > Cellular or Mobile Data.

  2. Tap Add Cellular Plan.

  3. Scan the QR code you received from your carrier.

  4. Follow the prompts to complete the activation process.

For Android:

  1. Go to Settings > Network & Internet > Mobile Network.

  2. Tap + or Add Carrier and choose Use eSIM.

  3. Scan the QR code or enter the activation details manually if required.

  4. Follow the instructions to activate your eSIM.

Step 4: Confirm Activation

Once you’ve scanned the QR code and followed the prompts, your eSIM should be activated. You should see the new mobile plan listed under Cellular Plans or Mobile Networks on your device. To ensure it’s working, try making a call or sending a text.

Best eSIM Providers in Japan

Now that you know how to activate eSIM, let’s talk about the best eSIM Japan options. Japan is known for its advanced mobile infrastructure, and there are several providers offering excellent eSIM services for tourists and business travelers alike. Whether you need a short-term plan or a long-term data solution, the best eSIM Japan providers offer flexible, cost-effective plans to keep you connected throughout your trip.

1. Airalo eSIM

Airalo is one of the most popular eSIM providers for international travelers. They offer eSIM data plans for Japan with competitive prices and flexible options. Airalo’s Japan eSIM plans are ideal for tourists who want to stay connected for short trips or long stays.

Features:

  • Affordable Rates: Airalo offers some of the most affordable eSIM data plans for Japan.

  • Prepaid Plans: Choose from various prepaid data plans, starting from 1GB for 7 days.

  • Easy Activation: Airalo provides a QR code that you can scan to activate your eSIM.

Best For:

  • Budget-conscious travelers who need reliable internet access in Japan.

2. Ubigi eSIM

Ubigi offers reliable eSIM services with competitive pricing and extensive coverage in Japan. Their eSIM plans are known for being flexible, allowing you to select the amount of data you need for your stay in Japan.

Features:

  • Global Coverage: Ubigi’s eSIM works in over 150 countries, including Japan.

  • Data Packages: Choose from various data packages with varying durations, from 7 days to 30 days.

  • Easy Setup: Ubigi allows for easy installation and setup, making it a hassle-free choice for tourists.

Best For:

  • Travelers who want global coverage and the flexibility to use their eSIM in multiple countries.

3. GigSky eSIM

GigSky provides high-speed data services in Japan through eSIM technology. It’s a great choice for travelers who want to stay connected with minimal effort. Their Japan eSIM plans are highly rated for their reliability and affordability.

Features:

  • Fast Speeds: GigSky offers high-speed data, perfect for streaming and browsing.

  • Flexible Plans: You can choose a plan based on your data needs, with options for short and long stays.

  • Pre-activated eSIM: GigSky’s eSIM can be pre-activated before your arrival, saving you time.

Best For:

  • Travelers who want a simple, high-speed eSIM solution for Japan.

4. Japan SIM Free

Japan SIM Free is a local provider offering eSIM plans for travelers to Japan. They provide flexible packages that cater specifically to tourists, ensuring you get the best experience while staying connected.

Features:

  • Local Service: Japan SIM Free offers native network connections, providing excellent coverage and reliable speeds.

  • Tourist-Focused Plans: Their plans are designed with tourists in mind, offering short-term packages.

  • Great Customer Support: Their customer service is available in English, making it easy for foreign travelers to get help when needed.

Best For:

  • Travelers who prefer a local provider with excellent customer support and great network coverage.

5. Docomo eSIM

Docomo is one of Japan’s leading mobile carriers and offers eSIM services to international travelers. Their eSIM plans are great for those looking for a reliable and high-speed mobile network during their stay in Japan.

Features:

  • Wide Coverage: As one of Japan’s largest mobile carriers, Docomo provides extensive coverage across the country.

  • Prepaid Options: Docomo offers prepaid eSIM plans with varying data amounts and durations.

  • Excellent Speeds: Docomo’s eSIM delivers fast speeds, making it ideal for heavy internet users.

Best For:

  • Travelers who want the best coverage and high-speed data in Japan.

How to Choose the Best eSIM Plan for Your Trip to Japan

When choosing the best eSIM provider for your Japan trip, consider the following factors:

  • Data Needs: Assess how much data you’ll need. If you’re using your phone for navigation, social media, and occasional browsing, a small data plan may be sufficient. However, if you plan to stream videos or use data-heavy apps, opt for a larger data plan.

  • Duration of Stay: Short-term travelers might find it more convenient to use prepaid eSIM plans, while longer-term visitors may benefit from more extensive options.

  • Coverage and Speeds: Ensure the eSIM provider offers reliable coverage and fast speeds throughout Japan, especially if you’re traveling to rural areas.

Conclusion

Activating an eSIM and choosing the best provider in Japan is a simple yet important step in ensuring you stay connected during your travels. eSIM technology offers unmatched convenience, allowing you to skip the hassle of swapping SIM cards while providing flexible, cost-effective mobile solutions. Providers like Airalo, Ubigi, GigSky, Japan SIM Free, and Docomo offer excellent eSIM services that cater to different traveler needs.

When choosing your provider, consider factors like data requirements, coverage, and customer support to ensure you get the best value for your trip. Now that you know how to activate eSIM and choose the best options for Japan, you’re ready to enjoy a seamless and connected travel experience!

FAQs

  1. Can I use eSIM in Japan on my iPhone?

Yes, iPhones from the iPhone XS and newer models support eSIM. You just need to ensure your device is unlocked and supports eSIM functionality.

  1. How much does an eSIM for Japan cost?

The cost of eSIM plans for Japan varies depending on the provider and the data plan you choose. Prices typically range from $10 for a basic plan to $50 or more for larger data packages.

  1. Can I use eSIM in multiple countries?

Yes, many eSIM providers offer global coverage, allowing you to use your eSIM in multiple countries, including Japan. However, it’s essential to check the provider’s coverage area before purchasing a plan.

  1. How long does it take to activate eSIM?

Activation is usually quick and can be done within minutes. After scanning the QR code, your eSIM should be activated within a few minutes.

  1. Is eSIM better than a physical SIM card?

eSIM offers several advantages, including no need for a physical card, the ability to switch carriers easily, and space-saving. It’s especially convenient for travelers who need multiple plans or need to switch networks frequently.

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Andrew October 16, 2025 October 16, 2025
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