What is an eSIM?

A digital SIM built right into your phone. Get data in Japan with just a QR code — no physical SIM card needed.

No SIM swapping

Instead of a small plastic SIM card, your carrier profile downloads straight to your phone. Nothing to pick up or return.

Set up with a QR code

Your QR code arrives by email right after payment. Before you leave, scan it while on Wi-Fi or install with a single tap.

Keep your own SIM

No need to take out your original SIM. Use the eSIM for data in Japan — your validity starts the day you first connect there.

Connect instantly upon arrival with one QR

A Japan-only eSIM using the KDDI(au) network. Simply select the days you need, and your QR code will be sent to your email and My Page right after payment. No need to pick up or return any device.

Why you'll love it

Unlimited Data — KDDI(au) 5G/LTE with no daily cap (up to 450Mbps)
Tethering Included — Used days − 1GB (e.g., 7 days → 6GB)
Validity doesn't shrink — Your usage period starts only on the day you first connect in Japan
One-tap Install — Install with a single button on both iPhone and Android

Please check before buying

An unlocked eSIM-compatible device is required
Data only (no phone number or SMS)
The QR code can be installed only once, and is non-refundable after issuance
If a massive amount of data is consumed in a short time, speed may be throttled according to the carrier's fair usage policy

Japan Unlimited eSIM