Japan eSIM on KDDI
This is a data-only Japan eSIM: unlimited high-speed data on your phone for 3 to 31 days, with no phone number, no cellular calls and no SMS. Hotspot sharing has its own separate total allowance, and messaging and calling apps run over the data connection instead.
What you get
Starts: First connection
Use apps to call
5G/4G where available
Is it right for your trip?
- You want data that does not run out partway through the trip.
- You navigate, stream and browse on your phone and want no allowance to watch.
- You use WhatsApp, LINE, FaceTime or similar apps instead of a cellular number.
- You need a Japanese phone number for bookings, deliveries or verification codes.
- You need to make or receive ordinary cellular calls or SMS.
- You need to tether heavily — hotspot use is capped separately on every duration.
- You need to receive bank or service one-time passcodes by SMS.
From payment to connected
- 1Pick and pay
Choose a plan and tick the two checks.
- 2Get the email
Your QR code and install steps arrive by email.
- 3Install on Wi-Fi
Check when your days start, then install the eSIM.
- 4Land and connect
Switch your phone’s mobile data to the eSIM line.
Not sure your phone supports eSIM? Check the device list
Technical details
- Network
- KDDI (au)
- Network type
- 5G/4G where available
- Coverage
- Japan · KDDI (au) 5G / 4G
- Phone number
- None
- APN
- uad5gn.au-net.ne.jp
- Activation
- First connection
- Check data
- See your install email
- Data
- Validity
About this plan
Starts on first network connection
The plan begins when the eSIM first connects to the network, not when you buy it. Install before you travel and enable it after you land.
No number, calls or SMS
This plan cannot receive one-time passcodes by SMS and cannot place or take ordinary phone calls. Keep your home SIM available if you need those.
Hotspot is capped
The hotspot allowance is separate from the unlimited phone data and is a total for the whole plan.
Install within 180 days
The eSIM must be installed within 180 days of purchase.
Compatible unlocked phone required
Confirm eSIM support and carrier-unlocked status before purchase.
Install on the final device
The QR code is for a single installation. It cannot be reinstalled or moved to another device, so do not delete the installed profile.