Are you planning a trip to Japan and wondering how to stay connected? From checking maps and translating signs to making restaurant reservations, having cellular data ready before departure makes your trip much smoother.
A Japan eSIM is a digital SIM installed directly onto your smartphone without swapping physical SIM cards. There is no need to pick up or return a pocket Wi-Fi device.
For first-time users, here is everything you need to know, from pre-purchase checks to installation.
Will a Japan eSIM Work on My Phone?
The very first thing to check before purchasing is whether your phone supports eSIM and if it is SIM-unlocked.
Even smartphones from the same brand can vary in eSIM support depending on the specific model and region of purchase. Please check your exact model rather than relying solely on the device name.
You can use the eSIM Compatibility Checker provided by KEICALL.
How Do I Choose the Right Duration for 3, 4, or 5-Day Trips?
Simply choose a plan based on the actual number of days you will be using data during your trip. For example, if your travel schedule spans from Friday to Sunday, a 3-day plan is suitable.
The validity period for KEICALL's Japan eSIM begins on the day you first connect to a network in Japan. Keep in mind that installing it before departure is separate from activating the plan's daily validity upon arrival.
Select your travel dates on the order page, review the displayed duration and total price, and complete your purchase.
What Is the Japan Unlimited eSIM Plan?
KEICALL's Japan unlimited eSIM is a data-only plan operating on Japan's KDDI (au) network. It does not include a voice phone number or SMS capabilities.
While data on your primary device comes with no daily cap, excessive usage in a short timeframe may be subject to speed throttling under local carrier Fair Usage Policies. Actual network speeds also depend on your location and network congestion.
In addition, on-device data usage and tethering (mobile hotspot) limits are different. Tethering data shared with other devices is provided as (number of days minus 1) GB. For instance, a 3-day plan includes 2 GB of tethering data, while a 7-day plan includes 6 GB.
If you plan to share your internet connection with a laptop or your companion's phone, please keep these terms in mind. Check Plan Details
Step-by-Step: Purchase to Installation
① Check Compatibility
Verify if your smartphone supports eSIM and is SIM-unlocked.
② Choose Your Plan & Purchase
Select your travel dates, review the plan conditions, and complete your payment.
③ Check Your eSIM Information
After payment, your QR code will be available via email and in My Page.
④ Install Before Departure
Follow the installation instructions under a stable Wi-Fi environment. Supported devices can also utilize one-tap installation.
⑤ Connect Upon Arrival in Japan
Select the eSIM line for cellular data following the provided setup guide and check your connection status.
For detailed setup steps, please refer to the KEICALL User Guide.
Important Things to Know Before Installation
The issued QR code is for one-time installation only. Please review the guidelines before deleting an installed eSIM or transferring it to another phone.
Additionally, as stated in the plan terms, refunds are not available once issued. Make sure to double-check device compatibility, travel dates, and usage conditions prior to payment. For more details, please see our Refund Policy.
Get Your Japan Travel Internet Ready Before You Leave
eSIM is a convenient choice for travelers who want to set up mobile internet without changing physical SIM cards or handling pocket Wi-Fi pickups and returns.
Check whether your device is compatible today and pick the best plan for your travel schedule.
👉 Check Japan KDDI (au) Unlimited eSIM
👉 Customer Support on KakaoTalk
#JapaneSIM #JapanTravel #UnlimitedDataeSIM #eSIMSetup #KEICALL