Best eSIM for Japan: Unlimited Data, Multi-Country & More

Planning a trip to Japan? Whether you're staying for just a few days or exploring the country (or continent) for several weeks, choosing the right eSIM for Japan means even the most disorganised person can do and see more. From short business trips to extended cultural immersions, there’s a plan to suit every adventure. Stay connected with all the data you need, and reliable coverage on fast networks like KDDI and NTT Docomo. Sim Local only partners with trusted networks like au Japan to give you that ‘just like home’ connection — wherever you are. 

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If you’re still not totally sold on a travel eSIM, remember: 

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1. You can activate one instantly, anywhere: eSIMs can be activated as soon as you land, saving you the hassle of finding a local SIM card or dealing with physical cards.
2. Stop worrying about roaming charges: With a few taps of your phone settings, you make the quick switch to a pay-as-you-go plan during your trip. 
3. Your phone probably supports eSIM: Most smartphones are compatible with eSIM technology nowadays. You can confirm here. 

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^{Best eSIMs for Japan}

Here's our list of the best eSIMs for Japan depending on your length of stay. Plus, if you're visiting multiple countries, there's a global option available to keep you online effortlessly as you cross borders.

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^{For Short Stays (3–4 days)}

Some travellers, especially those from nearby countries in Asia, may visit Japan for a shorter trip (maybe a long weekend), usually to focus on one or two cities, such as Tokyo or Osaka.

Japan Unlimited - 4 Day

AU

Unlimited

$13.00

4 Days

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Japan Unlimited – 4-Day eSIM

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Stay online during your short visit to Japan with this 4-day eSIM plan from au by KDDI, priced at $13 USD. Enjoy unlimited data on one of Japan's most popular networks, plus 3GB for data tethering if you need to share your connection.

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^{For 1 Week (7–10 days)}

Most first-timers go to Japan for at least a week, giving themselves a few days to explore Tokyo, including iconic neighbourhoods like Shibuya, Shinjuku, and Asakusa. Kyoto is usually on the itinerary too, known for its temples, shrines, and traditional culture, often requiring another 2–3 days.

Japan Unlimited - 10 Day

AU

Unlimited

$26.00

10 Days

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Best Value

Japan Unlimited – 10-Day eSIM

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For $26, this 10-day eSIM from au by KDDI gives you unlimited smartphone data while you explore Japan. It also allows tethering up to 3GB on the KDDI network.

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^{For 10–15 days}

A two-week trip provides a more relaxed itinerary, with time to explore additional cities and regions beyond the Tokyo-Kyoto-Osaka triangle, such as Hiroshima and Miyajima. Depending on the season, Hokkaido or Okinawa are also popular for exploring Japan’s northern or southern islands for skiing, beaches, and more. Looking for more things to do? How about Nikko, Kanazawa, or the Japanese Alps?

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Japan Unlimited - 15 Day

AU

Unlimited

$39.00

15 Days

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Top Seller

Japan Unlimited – 15-Day eSIM

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Enjoy unlimited data for 15 days on your trip to Japan with this $39 eSIM plan, also running on the KDDI network. Another great value plan from au, you can stay connected throughout your journey, with tethering available up to 3GB for hotspot sharing.

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^{For 3 Weeks or More}

Longer stays, from three weeks to a month, allow you to dive deeper into Japan’s culture, history, and natural beauty. Go off the beaten path and explore places like Kyushu, the southern island with hot springs (like Beppu) and volcanoes, Shikoku, known for the Shikoku Pilgrimage and beautiful landscapes, or Tohoku in the northern regions. Think: beautiful nature, onsen towns, and incredible history. There’s even time for ceremonial practices like tea ceremonies! 

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Japan 20 GB

Smartroam

20GB

$27.75

30 Days

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Top Seller

Japan 20 GB – 30 Day eSIM

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For $27.50, this 30-day Smartroam eSIM provides 20 GB of data, running on the NTT Docomo network to ensure the best possible connectivity. Data tethering and hotspot capabilities are included. 

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^{For World Travel}

If you’re planning to see Japan along with some other countries, South Korea is nearby and offers a vibrant nightlife and pop culture, while Taiwan is known for its food markets and bubble tea. And don’t get us started on China’s iconic landmarks like the Great Wall and Terracotta Army. Amazing.

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Global 10 GB

Orange FR

10GB

$32.00

31 Days

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Global 10 GB – 14 Day eSIM

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If Japan is just one stop on your multi-country adventure, then lucky you! Plus, it’s easier than ever to stay connected as you hop from destination to destination. Consider a Global 10 GB plan for $32.00. This data-only eSIM from Orange gives you 10 GB of data across 149 countries, including China, South Korea, and The Philippines ensuring you stay connected wherever you go. Data tethering? Hotspots? You got it all. The world is yours.  

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