When you land at a Japanese airport, the first thing you need to find your way to the hotel or check train schedules is an internet connection.
If you want an easy way to prepare internet access for your trip, consider using an eSIM downloaded directly to your phone. You won't need to wait for a physical SIM card delivery or carry around a Wi-Fi device.
How is an eSIM different from a standard SIM card?
An eSIM is a digital SIM built into your smartphone. Instead of swapping physical SIM cards, you add a mobile cellular service to your phone using an installation QR code or setup link.
There's no need to remove and store your original SIM, nor do you have to return any device after your trip. However, you must first verify whether your smartphone supports eSIM.
How to use KEICALL Japan eSIM
With KEICALL, you can order a data-only unlimited eSIM using Japan's KDDI (au) network. Simply select your required usage period and complete the payment to receive an installation QR code via email and My Page.
The setup steps are simple:
- Check if your smartphone supports eSIM and is SIM-unlocked.
- Select your desired usage period on the product page and complete payment.
- Follow the instructions to install the eSIM while connected to the internet.
- After arriving in Japan, check the provided settings and switch your data line to the eSIM.
For KEICALL products, the usage period begins on the day you first connect to the network in Japan. Installing it in advance while connected to stable Wi-Fi before departure makes your trip preparation much smoother.
Three essential checks before buying
① Check compatibility even if the phone model name looks the same.
eSIM support varies depending on the specific model and region of release. Please check KEICALL eSIM Device Checker before purchasing.
② This is a data-only plan.
Japanese phone numbers and SMS are not provided. Make sure to check whether you only need internet access for maps and browsing, or if your situation requires a local Japanese phone number.
③ Unlimited data and tethering limits are different.
While mobile data on your device is unlimited, speeds may be temporarily reduced under carrier policies if an excessive amount of data is consumed in a short time. Tethering has a separate limit—for example, the 7-day plan includes up to 6GB of tethering data.
Additionally, each QR code can only be installed once, and cancellations or refunds are generally not possible once issued. Please confirm your device model and terms of use before purchasing.
Who is eSIM best suited for?
An eSIM is a convenient choice for travelers who want to travel light, avoid swapping physical SIM cards, or have each group member use data on their own phone.
On the other hand, if your phone does not support eSIM or you need to connect multiple devices simultaneously, compare options like pocket Wi-Fi.
Before traveling to Japan, check if your smartphone is compatible. You can find detailed pricing by duration and terms on KEICALL.
👉 Check KEICALL Japan Unlimited eSIM
👉 Have questions before purchasing? Chat with customer support