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eSIM travel guide for Japan

Network speed
Excellent nationwide 4G/5G, even on bullet trains
Power plug
Type A/B, 100V
Emergency number
110 (police), 119 (fire/ambulance)
Best months to visit
March to May, October to November

Connectivity tip: Convenience store Wi-Fi is common, but an eSIM keeps maps and translation apps running everywhere, including rural shrines.

Frequently asked questions about eSIM in Japan

Will my phone work with an eSIM in Japan?

Most eSIM-compatible, unlocked phones released in the last few years will work in Japan. Dial *#06# on your device and check for an EID number to confirm support before you buy.

When should I activate my Japan eSIM?

You can install the eSIM before you leave home, then activate it once you land in Japan so your validity period starts exactly when you need it.

Can I keep my home number while using a Japan eSIM?

Yes. Your Japan eSIM plan runs alongside your existing SIM, so you keep your home number for calls and texts while using local data.

What if my eSIM doesn't connect in Japan?

First confirm your device is unlocked and eSIM-compatible, then check your network settings. If it still doesn't connect, contact our support team with your order number for help.

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