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DestinationsJapanUnlimited data (KDDI) / 9 days

Japan Unlimited data (KDDI)
9-day plan

Unlimited data, capped at 10Mbps

This is a data-only plan — no phone calls, and no sending or receiving SMS.
Tethering (hotspot) is limited to 8GB for the whole period
The date rolls over around 00:00 Japan time — activating just before that can burn most of day one

Only with eSIM.co.jp

Support you can count on
If a network problem stops you using the plan, we look into what happened and then refund you or send a replacement eSIM.
Keep your Japanese number
Your Japanese line stays in the phone. Your number and LINE do not change.
Support on LINE
Stuck on setup? Message a real person on LINE. Just add us as a friend — no phone call, no account.

Plan details

Coverage
Japan
Networks
KDDI（5G/4G）
High-speed data
No cap
When the period starts
Starts when the eSIM first connects to a local network at your destination — installing it before you leave does not start the clock.
How the period is counted
The plan is counted in local (UTC+9) calendar days, so a day ticks over around 00:00 Japan time
Tethering
Yes (up to 8GB for the whole period)
Voice / SMS
Not supported (data only)
Valid for
9 days from activation
Activate by
Activate within 30 days of receiving the QR code
Cancellation
Full refund any time before you add the eSIM to your device
Receipt
Download any time from your order page
Please note
Once the QR code has been scanned and the eSIM added to your device, the plan cannot be cancelled or refunded — whether or not the line has been activated. Please check device compatibility and SIM lock status first.

Why you can buy with confidence

Here’s what people usually want to know first.

Your eSIM reaches your inbox within minutes

Delivery is automatic, so late-night orders don’t sit waiting. If nothing arrives within 30 minutes, you can contact us right from your order page.

We never store your card number

Payment happens on the payment provider's screen (Stripe). Your card number never passes through our servers.

Talk to us in Japanese or English

050-1730-9585
Phone lines are open 9:00-16:00 JST, every day.
While you are travelling you can also reach us on LINE.

Who we are, how to reach us, and our refund conditions are all spelled out.Commercial Transactions ActRefundsCompany
9 days / Unlimited data (KDDI)
incl. tax

How activation works

Starts when the eSIM first connects to a local network at your destination — installing it before you leave does not start the clock.
Japan eSIM — Unlimited data (KDDI), 9 days