Japan eSIM for Travel – Instant 4G/5G Data

Instant mobile data in Japan from £4.99. No roaming charges. Keep your UK number. Activates the moment you land.

Japan is one of the most connected countries in the world, but finding affordable mobile data as a tourist can be challenging. TripSIM offers instant eSIM activation for Japan, giving you reliable 4G/5G data across all major cities including Tokyo, Osaka, Kyoto, and Hiroshima. No physical SIM card needed – just scan a QR code and connect.

Japan mobile networks

How it works

  1. Buy your plan in GBP at our UK Stripe checkout.
  2. Scan the QR code we email you within minutes.
  3. Land in Tokyo and connect automatically.

Japan eSIM FAQs

Does an eSIM work in Japan?

Yes — TripSIM eSIMs work across Japan on local 4G/5G networks (NTT Docomo, au (KDDI), SoftBank). You activate before you fly and it connects automatically when you land.

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

Yes. Your physical UK SIM stays active for calls, texts and WhatsApp. The TripSIM eSIM runs alongside it as a data-only line.

Is hotspot / tethering included?

Yes, every TripSIM plan supports personal hotspot.

When should I install the eSIM?

Install before you leave the UK while on WiFi. Activation only starts when you connect to a local network in Japan.

Is TripSIM cheaper than UK carrier roaming in Japan?

Almost always. UK carriers typically charge £8–£12 per MB with UK carriers in Japan. Save up to 95% compared to UK roaming charges.

Does eSIM work on the Tokyo Metro?

Yes, TripSIM eSIMs provide coverage on Tokyo Metro lines and most underground stations through NTT Docomo and SoftBank networks. Coverage may vary in deep underground sections.

Can I use Google Maps in Japan with a TripSIM eSIM?

Absolutely. Your TripSIM data plan works with all apps including Google Maps, Apple Maps, and Navitime Japan. Real-time navigation is essential for navigating Japan's complex rail network.

Is 5G available in Japan with TripSIM?

Yes, TripSIM connects to Japan's 5G networks where available, primarily in major cities like Tokyo, Osaka, and Nagoya. 4G LTE coverage is available nationwide.

How much data do I need for a week in Japan?

For typical tourist use (maps, social media, messaging, translation apps), 1–2 GB per day is sufficient. We recommend our 10 GB or unlimited plans for a 7-day trip.

Will my eSIM work on the bullet train (Shinkansen)?

Yes, you'll have coverage on Shinkansen routes between major cities. Brief signal drops may occur in long tunnels, but coverage is generally excellent.

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