What is eSIM? A Guide to Using eSIM in Japan

Introduction to eSIM

An eSIM (embedded SIM) is a digital SIM that allows you to activate a mobile plan without using a physical SIM card. Unlike traditional SIM cards, which require insertion into your phone, an eSIM is built into the device and can be programmed remotely. This technology provides greater flexibility, as travelers can easily switch between mobile plans without the need to visit a store or swap physical SIM cards.

For visitors to Japan, eSIM offers a convenient solution for staying connected without the hassle of purchasing and inserting a traditional SIM card. With various providers offering different pricing and data options, it is easier than ever to find a plan that suits your travel needs.

Benefits of Using an eSIM in Japan

Using an eSIM while traveling in Japan offers several advantages:

Instant Activation – Since there is no need for a physical SIM card, eSIMs can be activated before arriving in Japan or immediately upon landing by scanning a QR code.
No Physical SIM Swapping – You can keep your home SIM in your phone and use both simultaneously, ensuring you do not miss important messages from your original carrier.
Flexible Data Plans – eSIM providers offer various data plans, ranging from short-term packages for tourists to long-term plans for extended stays.
Better Connectivity – Many eSIMs operate on Japan’s leading networks, such as NTT Docomo, SoftBank, and KDDI, ensuring strong coverage throughout the country.
Eco-Friendly – eSIM eliminates plastic waste and the need for shipping physical SIM cards.

Compatible Devices

Not all smartphones support eSIM. However, most recent flagship devices are compatible, including:

iPhone models: iPhone 11 and later (including iPhone 14 and iPhone 15 series)
Samsung Galaxy: Galaxy S20 series and later
Google Pixel: Pixel 4 and later
Other brands: Many recent Xiaomi, Oppo, and Huawei models

Before purchasing an eSIM, check your phone’s settings under “Mobile Data” → “Add eSIM” to confirm compatibility.

Best eSIM Providers for Japan

Several providers offer eSIM services in Japan, catering to different needs. Below is a comparison of some of the most popular options.

1. Saily eSIM

Saily is a Japan-based eSIM provider that offers competitive pricing with strong connectivity through the SoftBank network. It is popular among short-term travelers due to its affordable data-only plans.

Network: SoftBank
Plans: Pay-as-you-go and pre-set data packages
Best for: Budget travelers and those who want flexible plans
Pros: No expiration, top-up available, supports multiple devices
Cons: No voice or SMS option

2. Ubigi

Ubigi is an international eSIM provider that offers global connectivity, making it ideal for travelers visiting multiple countries.

Network: NTT Docomo (Japan)
Plans: Pay-per-use and prepaid plans
Best for: Business travelers who need coverage beyond Japan
Pros: Multi-country plans, strong network coverage
Cons: Slightly more expensive than local providers

3. Holafly

Holafly is a travel-focused eSIM provider that offers unlimited data plans in Japan, making it a great option for those who rely on mobile internet throughout the day.

Network: SoftBank or NTT Docomo
Plans: Unlimited data for 5, 7, 15, or 30 days
Best for: Heavy data users who need unlimited browsing
Pros: No data caps, easy activation
Cons: No hotspot/tethering allowed, more expensive than metered plans

4. Japan Wireless eSIM

Japan Wireless is a well-known SIM and pocket WiFi provider that has expanded into eSIM services, catering specifically to tourists.

Network: SoftBank
Plans: 7, 14, or 30-day plans with unlimited data
Best for: Tourists who want a well-reviewed local provider
Pros: Unlimited data, reliable service
Cons: No option for long-term use

5. Nomad eSIM

Nomad is another international provider that offers flexible eSIM plans in Japan, often featuring discounted rates for longer stays.

Network: NTT Docomo
Plans: Daily or monthly data plans
Best for: Travelers who want pay-as-you-go options
Pros: Affordable rates, easy setup
Cons: Slower speeds compared to premium plans

6. Mobal eSIM

Mobal offers data and voice eSIM options, making it a great choice for travelers who need to make calls in Japan. It is one of the few eSIM providers that supports local phone numbers.

Network: SoftBank
Plans: Data-only or voice + data plans
Best for: Travelers who need a Japanese phone number
Pros: Call and SMS support, long-term options available
Cons: More expensive than data-only eSIMs

→ Purcahse Mobal eSIM

Which eSIM Should You Choose?

The best eSIM for your trip to Japan depends on your needs. If you are looking for the cheapest option, Saily eSIM offers one of the most affordable data-only plans. If you need unlimited data, Holafly or Japan Wireless would be the best choice. For business travelers or those visiting multiple countries, Ubigi provides great international coverage. If you need a Japanese phone number for calls and texts, Mobal is the most suitable provider.

How to Set Up an eSIM for Japan

Setting up an eSIM is straightforward and takes only a few minutes.

Check if your device supports eSIM by going to Settings → Mobile Data → Add eSIM.
Purchase an eSIM plan from your chosen provider.
Scan the QR code provided via email or directly in the provider’s app.
Activate the eSIM and select it as your preferred mobile data connection.
Start using your eSIM immediately upon arrival in Japan.

Conclusion

eSIM technology is an excellent option for travelers visiting Japan, offering convenience, flexibility, and reliable connectivity without the need for a physical SIM card. With multiple providers such as Saily, Ubigi, Holafly, Japan Wireless, Nomad, and Mobal, there is a plan suitable for every type of traveler. Whether you need a budget-friendly option, unlimited data, or a Japanese phone number, there is an eSIM provider that meets your needs.

By choosing an eSIM for Japan, you can enjoy seamless connectivity, skip the hassle of SIM card swaps, and stay connected from the moment you arrive.