4 Reasons Why eSIMs Are 'Extremely Useful' in Japan ✨
1. Immediate Internet Access on Temporary Return or Business Trip
No need to pick up a Wi-Fi router at the airport or swap SIM cards. Just scan the QR code after arriving in Japan to instantly contact family and friends.
2. End-of-Month Data Shortage & Outage Countermeasure
Ideal for getting an 'extra refill' when you run out of data at the end of the month, or as a backup secondary line in case of carrier network outages.
3. Enjoy Navigation and Videos During Travel
You can watch videos on the Shinkansen and use Google Maps while driving without worrying about data usage, making your trip many times more comfortable.
4. Remote Work and Workations
Ideal not only for working from home, but also for tethering while out and about or at cafes. You can work safely and comfortably without using public Wi-Fi, which may have security concerns.
List of Major App and Game Operation Status
Chatting, sending images, and free LINE calls are all usable without issues.
High-definition playback and posting are comfortable. *Displayed ads may be targeted at overseas users.
Japanese spots are displayed correctly based on your smartphone's GPS, and you can play without issues.
Walking navigation and train transfer searches are also comfortably accessible in real-time.
Blocked for overseas IPs to prevent fraud. Payment errors may occur.
※ It is usable with the Unlimited Plan.
Playback errors may occur due to Hong Kong IP restrictions and regional restrictions (geoblocking).
Communication errors occur because Cygames and DMM Games block overseas IPs.
※ It is usable with the Unlimited Plan.
Mega banks and online banks (Mitsubishi UFJ, Rakuten, etc.) may have overseas IP access restrictions.
If you still have a Japanese mobile carrier (docomo, au, SoftBank, etc.) SIM in your smartphone, you can use it by temporarily switching data communication to the 'Main Line (Japanese SIM)' in the settings only when using restricted apps!
The [Unlimited Plan] uses a Japanese IP, so you can use it without restrictions.
🇯🇵 By Tourist Spot! Usage Tips and Connectivity Points
For sightseeing in Tokyo, where you frequently search for complex subway transfers and post photos to social media, a stable connection even in underground areas and crowds is essential.
Using the official USJ app (to get queue tickets and check wait times) and searching for temple and shrine guides. Watching YouTube while traveling on the Shinkansen is also popular.
Even if your in-car navigation system is outdated, you can use Google Maps on your smartphone as a navigator. Music streaming while driving is also worry-free as long as you have enough data.
🛡️ Smart Dual-SIM Management for Emergencies
By keeping a Japanese SIM (Docomo, au, SoftBank, Rakuten Mobile, etc.) in your smartphone and adding Good eSIM, you can switch between two lines on a single smartphone.
📡 1. Zero Panic Even During a Communication Outage
Even if a communication outage occurs with your primary carrier, you can get back online in seconds simply by switching your data connection to "Good eSIM" in the settings screen.
🎛️ 2. Smart Switching Based on Usage
Use "Good eSIM" for data-heavy activities like watching videos and navigation, and quickly switch to your "Japanese SIM" only when using PayPay payments or banking apps to save data.
❓ Frequently Asked Questions
Q. Do I need to cancel my current carrier contract?
A. No, there is absolutely no need to cancel!
You can add Good eSIM as a second line while keeping your current SIM card in your phone.
Q. Can I use a phone number like 090 or 080 (voice calls)?
A. No phone number is provided as it is for data communication only.
You can use app calls such as LINE calls and Zoom as usual.
Q. Will my LINE account and data be deleted while using the eSIM?
A. Your data and account will not be deleted at all.
Since an eSIM is only for data communication (internet connection), it will not affect your LINE friends list or chat history. You can use app calls such as LINE calls and Zoom as usual.
Q. I will use it during a temporary return to Japan. When should I set it up?
A. Scan the QR code while you are abroad (before departure) or in a Wi-Fi environment, and turn on the line after arriving at a Japanese airport. Once you arrive, turn on "Data Roaming" for the eSIM and switch your data connection to the eSIM, and you will be able to connect to the Japanese internet immediately.
View Good eSIM Plans for Japan
We offer a wide range of data plans tailored to your needs, from short-term trips to long-term temporary returns.
We recommend scanning the QR code before departure in a stable communication environment.
