Japan eSIM on KDDI
This is a data-only Japan eSIM: unlimited on-device data held at up to 10Mbps for 3 to 10 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
10MAX plan, capped at 10Mbps
Is it right for your trip?
- You want data that does not run out on a short Japan trip.
- You use maps, transport bookings and messaging apps rather than high-bitrate video.
- You are happy to trade peak speed for an allowance you never have to watch.
- You need a Japanese phone number for bookings, deliveries or verification codes.
- You need to make or receive ordinary cellular calls or SMS.
- You want the fastest speed the network can give — this plan is held at 10Mbps.
- You need to tether heavily — hotspot use is capped separately.
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
- 10MAX plan, capped at 10Mbps
- 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
Speed is capped at 10Mbps
This cap applies for the entire plan. It suits maps, messaging and browsing; high-bitrate video may buffer.
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.
Hotspot is capped
The hotspot allowance is separate from the unlimited on-device 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 and cannot be moved to another device.