Japan is known for its advanced mobile technology, offering fast and reliable connections that make it easy to stay connected no matter where you are. With a mix of 4G LTE and the growing presence of 5G, Japan’s mobile networks are among the best in the world, ensuring smooth connectivity throughout your trip.
For international travelers, choosing the right mobile solution is important. With options like physical SIM cards, eSIMs, and Pocket WiFi, it’s essential to understand how each option works so you can stay connected without any headaches. Whether you’re in Japan for a short visit or a longer stay, having the right plan will make your time here a lot more convenient.
Japan’s 5G network is rapidly expanding, offering even faster speeds and improved reliability. With this shift, travelers can enjoy quicker downloads and better overall performance when connecting on the go.
Check out our plans to find the best option for your needs. From flexible eSIMs to Pocket WiFi, we’ve got you covered no matter how long you’re staying.
Table of Contents
1) The Japanese Mobile Network Landscape
Overview of Japan’s Mobile Infrastructure
2) Technology and Networks: What’s New?
3) eSIM: The Future of Mobile Connectivity in Japan
4) Frequency Bands: What You Need to Know
5) Using Your Cell Phone in Japan: Checklist
6) Stay Connected with Sakura Mobile
The Japanese Mobile Network Landscape
Overview of Japan’s Mobile Infrastructure
Japan has come a long way in its mobile network development. Initially, the country used its unique technologies, but over the years, Japan has shifted towards more globally compatible networks, especially as 4G LTE and 5G became the standard. Today, Japan offers some of the most advanced mobile services in the world, making it easy for both locals and visitors to stay connected no matter where they are.
For international travelers, getting connected to Japan’s mobile network has become simpler than ever. With the availability of SIM cards, eSIMs, and Pocket WiFi, tourists can quickly access mobile data without much hassle, even if their phone wasn’t originally designed for use in Japan.
Key Carriers in Japan
Japan’s mobile network is built on several key carriers, each with unique strengths. Here’s a quick breakdown of the major players and how they compare:
NTT docomo is the largest carrier in Japan, offering the most extensive coverage across both urban and rural areas. This makes it a solid choice for tourists, as it ensures reliable service wherever you go. Sakura Mobile, for example, uses NTT docomo’s network to provide extensive coverage for its customers.
au (KDDI) shines in rural areas, making it ideal for those traveling outside Japan’s big cities. It also provides solid service in urban centers, though it’s especially popular for its strong rural coverage.
SoftBank is well-known for its competitive pricing and solid coverage in Japan’s major cities. It’s a good choice if you’re focused on staying connected while exploring urban areas.
Though not one of Japan’s major carriers, Sakura Mobile is a popular choice for travelers. It uses docomo’s network for 4G and au’s network for 5G for their plans, ensuring strong coverage nationwide.What makes Sakura Mobile stand out is its flexibility and focus on English-speaking support. Offering both SIM cards and eSIMs, it provides an easy, reliable solution for staying connected in Japan.
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Technology and Networks: What’s New?
5G in Japan
Japan is at the forefront of 5G technology, offering mobile speeds up to 10 times faster than 4G LTE. This means quicker downloads, smoother streaming, and better overall performance while on the go for sharing photos, making video calls, or browsing the web.
The 5G network is still being rolled out, but coverage is rapidly expanding, especially in major cities like Tokyo, Osaka, and Kyoto. This makes it an excellent option for travelers staying in urban areas, as you’ll have access to some of the best mobile speeds available today.
Check out our eSIM plans for seamless 5G connectivity, and enjoy unlimited high-speed internet wherever you are in Japan.
Verizon in Japan: Comparing Plans and Cheaper SIM Options
Guide to AT&T International Plans in Japan
Guide to T-Mobile’s Japan Roaming Plans
4G LTE and 3G Networks
While 5G is becoming more common, most phones today are compatible with 4G LTE, which offers fast and reliable internet speeds across Japan. If your phone isn’t 5G-compatible, don’t worry—4G will still provide you with plenty of speed for most tasks.
Japan’s 3G networks are still in use but are gradually being phased out as the country shifts to faster technologies like 4G and 5G. As a result, it’s a good idea to ensure your phone supports 4G to avoid any issues with connectivity during your trip.
Explore our SIM card options for fast 4G connectivity during your stay in Japan, and make sure you’re ready to enjoy seamless internet access from the moment you arrive.
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eSIM: The Future of Mobile Connectivity in Japan
eSIM is quickly becoming the go-to solution for mobile connectivity, especially for travelers in Japan. One of its biggest advantages is instant activation—you can get your connection set up before you even land, so you’re ready to go as soon as you arrive. No more waiting in line at the airport or dealing with physical SIM cards.
eSIMs also eliminate the need for a physical card, making it even more convenient. Plus, eSIMs are compatible with multiple devices, offering flexibility if you want to use the same plan across different gadgets like your phone, tablet, or even a smartwatch. It’s a great option for frequent travelers who want a hassle-free way to stay connected without switching SIM cards for each trip.
Sakura Mobile eSIM Options
With Sakura Mobile, getting an eSIM for your trip to Japan is simple. The activation process is straightforward, and there’s no need for a physical SIM card at all. Our eSIMs provide a seamless digital solution that keeps you connected while traveling, all without the hassle of swapping out cards or searching for stores to buy SIMs.
Pro Tip:
With Sakura Mobile’s 5G unlimited eSIM plan, you get unlimited data with no fair usage policy, so you can use as much data as you need without worrying about hitting a limit. The best part? Once you activate your eSIM, the 5G network will automatically integrate with your phone—no need to change any settings. Just download and go! It’s a hassle-free way to enjoy blazing-fast internet during your trip.
Frequency Bands: What You Need to Know
3G Networks
Japan’s 3G networks primarily use Band 1 (2100 MHz) and Band 19 (800 MHz). These bands offer reliable coverage in both urban and rural areas, but as Japan continues to move towards faster technologies like 4G and 5G, 3G networks are gradually being phased out. If you’re planning to travel soon, it’s a good idea to make sure your phone supports 4G for better performance.
4G LTE Networks
Japan’s 4G LTE networks operate across several frequency bands to ensure coverage in different regions. These include:
・Band 1 (2100 MHz)
・Band 3 (1800 MHz)
・Band 19 (800 MHz)
・Band 21 (1500 MHz)
These bands work together to deliver reliable service in both urban areas and more rural locations. Most modern phones are compatible with these bands, so you can expect fast, stable 4G speeds while you’re in Japan.
5G Networks
For 5G, Japan primarily uses the N257 (28 GHz) and N78 (3.5 GHz) bands, which offer incredibly fast speeds. However, it’s important to note that 5G coverage is still expanding and is more readily available in major cities. Rural areas may not have as strong 5G coverage yet, so it’s best to rely on 4G when traveling outside urban centers.
Check if your phone is compatible with Japan’s networks
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Using your Cell Phone in Japan: The Checklist
To make sure your phone works smoothly during your trip to Japan, use this simple checklist to get everything in order:
1. Make Sure Your Phone is Unlocked
Before traveling, make sure your phone is unlocked and can accept a Japanese SIM card or eSIM. If it’s locked to a specific carrier, check with your provider to unlock it. This step is important for getting connected without issues.
2. Check Compatibility with Japan’s Frequency Bands
Japan uses specific frequency bands for its mobile networks. Double-check that your phone supports these bands to ensure you’ll have access to 4G and 5G networks during your stay. Visit our compatibility page for Sakura Mobile to confirm your phone’s compatibility with Japan’s network.
3. Confirm Coverage in Your Travel Area
Coverage can vary depending on where you’ll be in Japan. Major cities are well-covered, but if you’re planning to visit rural areas, check carrier coverage maps to make sure you’ll have service at your destination. This way, you won’t be left without a signal when you need it most.
4. Consider an eSIM or Pocket WiFi
・eSIM: For an easy, digital solution that doesn’t require a physical SIM card, consider using an eSIM. It’s quick to activate, and you can set it up before you even arrive.
・Physical SIM: If your phone is unlocked but not eSIM-compatible, a prepaid SIM card is a simple option. You can order one online before your trip or buy one at the airport.
・Pocket WiFi: If your phone isn’t compatible with Japan’s networks, or if you need to connect multiple devices, Pocket WiFi is a great option. It provides unlimited internet for your phone, tablet, and other devices, all in a compact portable device.
Get step-by-step mobile setup help
Stay Connected with Sakura Mobile
Sakura Mobile offers affordable, fast internet through our SIM cards and eSIMs, using NTT docomo’s 4G network and AU’s 5G network for reliable coverage across Japan, from cities to rural areas. If your phone isn’t compatible or you need to connect multiple devices, our Pocket WiFi is a great alternative, providing unlimited data on the go.
Customer Support
We offer English-speaking support to assist tourists and business travelers, making sure you stay connected without hassle. You can also check our SIM card & eSIM compatibility page to ensure your phone works with our network, and our team is available to help with any questions you may have.
Have more questions? Contact our customer support team for assistance or to get personalized recommendations on your mobile solution in Japan.
CUSTOMER’S VOICE