Japan eSIM
KDDI’s own network in Japan. Pick unlimited or a fixed amount, then your days.
- Network
- APN
- Activation
- Check data
From payment to connected, in four steps.
- 1Order any time
Most plans start when the eSIM first connects — check “Starts” above.
- 2Install before you fly
One QR code, one installation. Use stable Wi-Fi and keep the profile.
- 3Land and connect
The eSIM joins its local network on arrival.
- 4Share your number
On number plans, use it instead of your personal line.
About Japan plans.
Answers taken from each plan’s own terms.
What’s the difference between these plans?
Unlimited, full speed: No data cap at full speed. 3 to 31 days. Unlimited, up to 10Mbps: No cap, up to 10Mbps — enough for maps, social and video. Fixed data, full speed: 12, 21 or 30GB at full speed, with hotspot. Set data: 10GB to 30GB in total, then up to 128kbps. No number.
When does the plan start?
KDDI unlimited: First connection. Unlimited data on the phone. Install within 180 days of purchase; days start on first connection. KDDI 10MAX: First connection. Speed is capped at 10Mbps for the whole plan — no data cap. KDDI full-speed data: First connection. Full speed until the data is used, then data stops. Set data: Turn on when you arrive. Data only — no number. Use messaging apps for calls.
How do I check my data?
KDDI unlimited: See your install email · KDDI 10MAX: See your install email · KDDI full-speed data: See your install email · Set data: See your install email
Can people call me?
No. These are data-only plans — use WhatsApp, Line or other apps for calls.