Best eSIM for Japan travel in 2025

Nowadays, staying connected while traveling in Japan is essential, whether you’re visiting for the Osaka-Kansai World Expo, the Japanese Grand Prix, or simply exploring its vibrant cities. Instead of tracking down a local SIM card or relying on risky public Wi-Fi, an eSIM offers an instant, hassle-free connection.

Japan eSIMs are virtual SIM cards embedded directly into a smartphone, so you don’t have to swap them manually. The best eSIM for Japan helps you avoid expensive roaming fees, slow networks, and limited coverage. However, choosing a reliable eSIM provider can be challenging since there are numerous services with different pricing plans and data caps.

As an avid traveler, I have tested over 10 eSIM providers to find the most reliable options. Without further ado, here’s my list of the best Japan eSIM services.

Top 5 Japan eSIMs in 2025

1. Saily

   Overall best eSIM for Japan with cheap data plans
   9.6
2. Airalo

   Reliable Japan eSIM for long-term travelers
   9.3
3. Jetpac

   Best 5G eSIM for Japan
   9.2
4. aloSIM

   Japan eSIM with phone number
   8.8
5. Nomad

   User-friendly eSIM for Japan
   8.4

What to consider when choosing an eSIM card for Japan

Multiple eSIM Japan services compete for your attention, so choosing the right one can be tricky. Overall, the best Japan eSIM should offer strong coverage, fast speeds, and affordable data plans – but not all providers check these boxes. That said, here's what you should consider before purchasing:

• Destination. Do you need an eSIM for Japan only, or will you be visiting neighboring countries? For example, you can get 5GB of data in Japan from Saily for $10.99. Meanwhile, Jetpac offers an Asia-Pacific plan, which costs $15 for the same bandwidth.
• Data usage. Consider how much eSIM data for Japan you’ll need. For instance, I usually need just 1-3GB for light browsing, navigation, and messaging, but for video calls, streaming, and social media I'll need at least 5GB or more.
• Communication needs. Only a few eSIM providers support traditional phone calls or SMS, so you'll often need to rely on VoIP apps like FaceTime or WhatsApp. However, aloSIM offers a Canadian or US number for international calls.
• Travel duration. Japan eSIM prices depend on travel duration. Pick one that fits within your voyage limits to reduce unnecessary costs.
• Tethering. If you're traveling in a group or need internet access on your other devices, mobile hotspot support is crucial. Unfortunately, some Japan eSIM providers block tethering, so always double-check before purchasing whether you can share data seamlessly.
• Speed and network reliability. Not all eSIMs offer full-speed access in Japan. Therefore, look for providers that support 4G/5G networks and ideally partner with network providers like NTT Docomo, SoftBank, or KDDI to ensure fast, reliable internet wherever you travel.

Best eSIM for Japan travel: detailed list

1. Saily – cheapest eSIM for Japan travel in 2025
2. Airalo – flexible eSIM with Asian regional plans
3. Jetpac - Japan eSIM card with 5G data
4. aloSIM – eSIM with data and international phone number
5. Nomad – Japan eSIM that supports data sharing

eSIMs significantly differ in regional coverage, plan pricing, app design and setup process, connection speed, and additional features like tethering. After testing 10 eSIM Japan providers for these criteria, I narrowed the list down to 5 that find the middle ground between quality and affordability.

1. Saily – overall best eSIM for Japan

Saily is the best eSIM for Japan in 2025, which offers fast 4G/5G speeds while maintaining compatibility with LTE and 3G networks. Its flexible data plans range from 1GB to 20GB, making it a great choice for travelers. It's also one of the most affordable eSIM services I've tested. For example, 1GB of data in Japan costs only $3.99, and prices drop even lower in Thailand ($2.99 per GB), making it an excellent choice for travel in the far East Asia region. Additionally, you can save on Japan eSIM plans using Saily coupon codes!

Saily covers 190+ countries and also offers regional eSIM plans. So, if you’re traveling beyond Japan, you can choose the Global eSIM Plans package, starting at $8.99 for 1GB. The Asia and Oceania eSIM plan package is a budget-friendly alternative, starting at just $4.99/week. Additionally, Saily connects to Japan’s top mobile networks, ensuring reliable coverage and strong connectivity throughout the country. However, Saily does not support phone calls and text messages, so you should look at other options if you need a Japan eSIM with a phone number. On the flip side, it offers tethering and a user-friendly app to get instant internet access the moment you arrive in Japan.

I particularly liked the straightforward Saily setup. You can download the app from the Google Play Store or Apple's App Store and pay via Visa, MasterCard, AMEX, or Discover. Saily provides step-by-step in-app activation instructions, making the setup effortless even for first-time eSIM users. It also offers 24/7 live chat, email support, and an online help center.

2. Airalo – eSIM card for Japan and whole the Asia region

If you’re looking for an eSIM for Japan, Korea, and the rest of Asia, Airalo is one of the best options available. I concluded that Airalo offers some of the best regional and global eSIM plans, making it a top choice for frequent travelers. Airalo's Asialink plan covers 18+ countries with 1GB of data, and starts at $5.00. Simultaneously, its Discover+ plan provides global coverage in 190+ countries with 1GB starting at $9.00. To make your purchase even more affordable, check for Airalo discount codes.

What I liked most is that Airalo eSIM allows phone calls and text messages, but only on the Discover+ plan, which comes with an extra charge. The plans range from 1GB to 20GB and last from 7 days to 365 days, ensuring uninterrupted internet access while away from home.

Airalo supports 3G, 4G, 5G, and LTE networks and the eSIM allows hotspot tethering. However, there are no pay-as-you-go plans, so you’ll need to monitor data usage carefully. You can top up your data on rechargeable eSIMs, but not all plans support this, so you’ll need to check the app for details.

Lastly, Airalo does not require eKYC for activation and offers a simple app, making it an ideal Japan eSIM for tourists.

For a deeper investigation of Airalo, read our Airalo review.

3. Jetpac – Japan eSIM with flexible plans

Jetpac is a budget-friendly and flexible eSIM option for Japan travelers. With coverage in over 150+ countries, it offers data plans at just $1 for 1GB (valid for 4 days) for new users. For longer stays, Jetpac has Japan-specific plans that range from 3GB ($6 for 7 days) up to 50GB ($30 for 10 days). If you’re planning to visit multiple destinations, Jetpac’s Global plan even offers up to 100GB for 365 days, while the Asia-Pacific eSIM plan covers 16+ countries, with 3GB for $11 (7 days) or up to 40GB for 30 days.

Unfortunately, Jetpac doesn’t offer phone calls or traditional SMS messaging, but you can always add more data whenever you need. For instance, when I traveled through Japan, I bought a month-long 5GB plan, and when it didn’t quite cover my needs, I topped it up effortlessly. Plus, Jetpac provides reliable 4G, LTE, and 5G connectivity, making browsing, streaming, and staying connected a breeze throughout my trip.

Setting up Jetpac is quick and simple, and you can purchase it directly from the Google Play or Apple App Store. Plus, 24/7 customer support is available if you need assistance. A unique perk that Jetpac offers is the complimentary airport lounge access (Smart Delay) if your flight is delayed. You simply need to register your flight details in the app and receive a confirmation email. Even better, you can bring up to five travel companions to relax with you.

4. aloSIM – Japan eSIM with phone number

aloSIM is among the recommended eSIMs for Japan for travelers who need a phone number for international calls. While it doesn't support phone calls within the app, it works with an additional app called Hushed, which provides Canadian or US numbers for calling and texting abroad. I tested this feature, and while it required a few extra steps, the results were excellent.

aloSIM is also among the best eSIMs for traveling to Japan and neighboring countries. For solo Japan trips, 1GB of data costs $4.50.Alternatively, if you plan to visit other destinations, you can go for the Asia plan, which covers 13+ countries, starting from $5. Just keep in mind that aloSIM doesn’t offer a global plan, so it’s better suited for trips to Japan and neighboring countries.

I found the aloSIM app simple and intuitive to navigate. Similarly to Saily, it also provides in-app guides on effortless eSIM setup. Tethering is another similarity, as both providers allow you to share eSIM data via a hotspot.

aloSIM offers seven Japan eSIM plans from 1GB to 100GB, valid for up to 180 days. In Japan, aloSIM connects you to au (KDDI), one of Japan’s leading carriers, ensuring reliable LTE and 5G speeds for smooth browsing, streaming, and navigation. If you ever run into trouble, there is also 24/7 live chat support.

For a deeper investigation of aloSIM, read our aloSIM review.

5. Nomad – user-friendly Japan eSIM

Nomad is another great eSIM provider for Japan, especially if you need flexible data plans to cover different travel needs. Nomad’s Japan eSIM plans start at $4 for 1 day (1GB), and the longest 45-day plan costs $57. In case you are planning to visit other regions too, you can get the regional China-Japan-South Korea plan or Asia Pacific plan, which includes 14 or 21 countries.

In Japan, Nomad connects you to the KDDI network, ensuring fast and reliable 4G and 5G speeds. The eSIM allows data sharing that you can use between devices. In addition, once you reach your data cap, Nomad allows an unlimited 512kbps connection, enough for basic tasks like browsing or email.

Nomad lacks support for international calls and SMS, but you can still use WhatsApp, FaceTime, or other VoIP services. Nomad also allows add-on plans that will automatically become active once your original plan expires.

Getting started with Nomad was easy: I bought the eSIM, received a QR code instantly, and had it activated in minutes. Plus, 24/7 customer support is available if needed, making it a hassle-free choice for staying connected in Japan.

For a deeper investigation of Nomad, read our Nomad review.

Japan eSIM comparison

How to get an eSIM for Japan?

eSIMs allow you to activate mobile data directly on your phone, offering a seamless experience while exploring Japan's vibrant cities, culture, and technology. Whether you're staying for a short visit or an extended stay, here's a step-by-step guide on how to easily get and use an eSIM in Japan:

Step 1: Check if your phone supports eSIM

Before purchasing an eSIM for Japan, confirm that your device is eSIM-compatible. Most modern smartphones, including recent models from Apple, Google, and Samsung, support this feature. However, smartphones released before 2018 do not support eSIMs. I've compiled a list of the most popular smartphone brands and models that are compatible with eSIMs in Japan:

Step 2: Select a reliable eSIM provider for Japan

Several reputable eSIM providers offer plans for Japan, but Saily stands out as the best eSIM for Japan. It offers affordable data plans for both short-term and long-term travelers, with high-speed internet access across Japan.

Step 3: Choose a suitable data plan

Choosing the right eSIM plan for Japan depends on your travel length and data needs. For instance, for short trips, Saily’s 1GB plan ($3.99 for 7 days) is a budget-friendly pick, while long-term travelers can benefit from the 20GB plan ($24.99 for 30 days). If you plan to visit multiple countries, Saily’s Asia and Oceania eSIM covers 19+ countries, starting at $4.99 for 1GB (7 days). Keep in mind that Saily doesn’t include a phone number, but you can still make calls using VoIP apps like WhatsApp and FaceTime.

Step 4: Install and activate your eSIM

After purchasing your data plan, download the Saily app from the Google Play Store or Apple App Store. Log into the app with the account used for your purchase, tap ‘Install eSIM,’ and follow the on-screen prompts. That’s it – your eSIM will activate automatically upon arrival in Japan!

In case your eSIM doesn’t activate in Japan, here are a few troubleshooting steps that you may try:

• Turn airplane mode on and off. This will refresh your network connection and may help the eSIM register with a local carrier.
• Restart your device. A quick phone restart can help detect the eSIM properly.
• Check mobile data and roaming. Make sure that mobile data and roaming are enabled in your phone settings, as eSIMs rely on data.
• Reinstall the eSIM. Try removing and reinstalling it via the Saily app.
• Contact support. If the issue persists, reach out to Saily’s 24/7 live chat support for assistance.

Get Saily eSIM for Japan now

eSIM card for Japan benefits

When it comes to fast and reliable internet access, eSIMs usually outperform traditional SIM cards. One of the biggest advantages is avoiding expensive roaming fees. For example, Verizon offers a TravelPass that lets you use its mobile services outside the US, costing $10/day in Japan. Alternatively, Saily offers 5GB for 30 days in Japan from Saily at a much lower cost – making the savings significant.

You will likely receive much better connection speeds using eSIMs for Japan. Since eSIMs work directly with local mobile carriers, they benefit from Japan’s advanced network infrastructure. On top of that, you can use a regular SIM and an eSIM simultaneously and reserve your data usage for the latter, which is often faster and more affordable.

Lastly, you will never lose your eSIM since they are virtual cards embedded directly into your smartphone’s hardware. So, while it's easy to misplace a physical SIM card when you are preoccupied with sightseeing, that can never happen with an eSIM.

Essential information for using an eSIM card in Japan

That's all there is to know about the best Japan eSIM services. Here's a summary of the key points:

• Reliable internet access. Japan eSIMs provide internet access the moment you land in the country. It's best to purchase your eSIM in advance and activate it right before your departure.
• Reduce roaming charges. Mobile carriers often charge hefty sums to keep using their services abroad. eSIMs work with local mobile carriers to provide better prices.
• Device compatibility. Not all devices support eSIM cards. As long as your smartphone was released after 2018, you shouldn't have any problems using it. However, if your device is older, check its eSIM compatibility before purchasing.
• Avoid public Wi-Fi. Hotspots in public places are often disappointingly slow. Furthermore, they are a perfect spot for hackers to target unsecured devices. The best eSIM for Japan eliminates these risks.
• Check tethering and phone call support. Not all eSIM services offer a phone number or can be used as a hotspot. Verify your chosen eSIM service supports these features if you need them.

How to make calls with eSIM in Japan

Although some Japanese eSIMs offer a phone number for international calls, you will often have to rely on VoIP apps. Here's how to do it:

1. Subscribe to a reliable eSIM for Japan
2. Choose a VoIP app, like FaceTime or WhatsApp, and set it up
3. Make sure you have activated the Japan eSIM plan before you leave
4. Turn off your default mobile carrier connection and switch to an eSIM before making the call
5. Launch the chosen VoIP app and now you can make a call from Japan

Conclusion: what is the best Japan eSIM for tourist

A Japan eSIM makes staying connected simple and affordable while traveling. It helps you avoid high roaming fees and provides access to fast, reliable networks at competitive rates. eSIMs are particularly convenient for multi-country trips – you can easily switch between data plans tailored to each country’s needs without swapping physical SIM cards.

After testing various providers, I recommend Saily as the best eSIM choice for Japan. Of the 10 eSIM providers that I’ve tested, Saily offers the most affordable plans, starting at just $3.99 for 1GB (7 days). It's easy to set up, with a user-friendly app that guides you through the activation process. Plus, it offers 24/7 customer support and 4G/5G speeds. The only downside is that Saily doesn’t include phone numbers. Nevertheless, it’s the best eSIM for fast, inexpensive, and reliable mobile data service in Japan.

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Japan eSIM FAQ

Is it better to get an eSIM or pocket WiFi in Japan?

Pocket WiFi and eSIMs both have advantages in Japan. Pocket WiFi provides a stronger, dedicated signal for multiple devices, making it better for families or business trips needing high-speed, uninterrupted connectivity. Meanwhile, eSIMs offer instant activation, 4G/5G speeds, and no rental fees – ideal for solo travelers.

Is eSIM available in Japan?

Yes, eSIMs are readily available in Japan, allowing travelers to access mobile data without swapping physical SIM cards. Many providers, including Saily, Airalo, and Nomad, offer eSIM data plans with 4G/5G speeds, while major carriers like SoftBank and KDDI also support eSIM activation.

Which eSIM is best for Japan?

The best eSIM for Japan depends on your travel needs. For short trips, Saily and Jetpac offer the most affordable plans, with flexible data options. For long-term stays, choose aloSIM, which offers unlimited data plan for 10 days, or an eSIM which allows add-ons, like Nomad.

Is 10 GB enough for 2 weeks in Japan?

Yes, 10GB is typically enough for 2 weeks in Japan if you mainly use data for navigation, social media, and light browsing. However, if you stream videos, make video calls, or use mobile hotspots frequently, you may need a higher data plan or a top-up option.

What is the best eSIM for Japan with unlimited data?

Nomad is the best eSIM for Japan with unlimited data. It offers fast 4G/5G speeds with no need for top-ups. However, it only allows 2GB per day before reduced speeds. Overall, it’s perfect for long-term travelers who need uninterrupted connectivity.

Can I make calls with eSIM in Japan?

Yes, some eSIM providers in Japan support phone calls, but most only offer data plans. If you need a phone number, Airalo’s Discover+ plan or aloSIM (via Hushed) lets you make international calls. Otherwise, VoIP apps like WhatsApp or FaceTime can be used to call over data.

Where can I find cheap Japan eSIM plans?

Jetpac offers the cheapest Japan eSIM prices, with t 1GB for just $1 (valid for 4 days) for new users. However, for longer stays, Saily is the better choice. It has affordable long-term plans starting at $3.99 for 1GB, but you can also order 20GB for $22.99 (30 days). It's ideal if you need consistent access over several weeks.

What is the best eSIM for Japan and Korea?

Saily is the best eSIM for Japan and Korea, with plans starting at $3.99 for 1GB for both countries. For multi-country travel, Saily’s Asia & Oceania plan covers 19+ destinations, including Japan and South Korea, offering seamless connectivity and affordable rates. It’s ideal for travelers exploring multiple regions in East Asia.