Find the Perfect eSIM for Your Japan Trip
We've tested and selected the best option for you. For 2025, we highly recommend Ubigi to stay seamlessly connected.
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Get 10% OFF your first data plan purchase.
eSIM Plans for Japan
Our "Best Value" picks are perfect for most trips. All other plans sorted by price.
Featured Insights
Our top guides and reviews to help you plan your trip.
A Deep Dive into Ubigis eSIM Reviews: What Users on App Store, Google Play, Trustpilot, and Reddit Really Care About (2025 Japan Focus)
An in-depth analysis of over 2,500 user reviews to uncover the real performance of Ubigi eSIM in Japan. This 2025 guide focuses on user feedback from the App Store, Reddit, and more to help you choose the best mobile data for your Japan trip.
Ubigi in Japan: A Data Report on Connectivity from 2,500+ User Reviews
Is Ubigi reliable in Japan? We objectively analyze 2,500+ user reviews, presenting the real data on its connection speed, stability, and device compatibility.
My Honest Ubigi eSIM Review for Japan (2025): What 2,500+ Travelers Actually Experienced
Is Ubigi any good in Japan? We analyzed over 2,500 real user data points from the App Store, Google Play, Trustpilot and reddit to find the truth about its speed, reliability, and value.
How eSIM Works: 3 Easy Steps
Choose Your Plan
Select a data plan from our list that best fits your itinerary and click "Get Deal" to purchase.
Install Your eSIM
You'll receive a QR code via email. Scan it with your phone while on Wi-Fi to install the eSIM profile.
Activate on Arrival
Once you land in Japan, switch your phone's cellular data to the new eSIM in your settings, and you're instantly online!
Our Review Principles
We are committed to providing you with honest, objective, and reliable advice.
Authentic & Data-Driven
We don't just test on the ground; we analyze thousands of real user data points to give you the most accurate reviews.
100% Objective & Independent
Rankings are based solely on data and user experience. We earn income via affiliate links, but this never affects our recommendations or your price.
Constantly Updated
Markets and products change. We review and update all information monthly to ensure you get the most current and accurate advice.
Does Your Phone Support eSIM?
Before you buy, please confirm that your phone is eSIM-compatible. This is a crucial step.
Important Note
iPhones and some Android phones purchased in Mainland China typically do not support eSIM. Please check in your phone's "Settings" > "Cellular" for an "Add eSIM" or "Add Cellular Plan" option.
Frequently Asked Questions
What is an eSIM and how is it different?
An eSIM is an "embedded SIM," a digital chip built into your phone. It works just like a physical SIM, but you don't need to insert a card. You install it by scanning a QR code, making it incredibly convenient for travelers.
Can I still receive calls on my original number?
Yes, absolutely! This is a major advantage of eSIMs. Your phone can keep both your original SIM (for calls and texts) and the Japan eSIM (for data) active simultaneously. You can designate the eSIM for data usage in your settings while never missing calls or texts from your home number.
What happens if I run out of data?
Most providers, like Ubigi, allow you to easily top up or purchase a new data plan through their official app. The entire process takes just a few minutes, with no need to change the eSIM.
Can I use the eSIM for tethering / personal hotspot?
This depends on the specific plan. Most Ubigi plans for Japan allow you to use your phone as a personal hotspot to share your data connection with other devices like laptops or tablets. It's best to confirm on the provider's page before purchasing if this feature is critical for you.
When should I install and activate my eSIM?
Install your eSIM before you travel, while you have a stable Wi-Fi connection (e.g., at home or the airport). However, you should only **activate** it upon arrival in Japan. The validity period of your plan starts from the moment of activation, so activating it before you land will waste days of use.
What should I do if my eSIM doesn't work?
First, double-check that you have selected the eSIM for Cellular Data in your phone's settings. Second, ensure that "Data Roaming" is turned ON for the eSIM profile. If it still doesn't connect, a simple restart of your phone often solves the issue. If problems persist, you should contact the provider's customer support for assistance.