eSIM for Japan

Japan: 84 data plans from $0.99, valid for 3–365 days. The eSIM connects to KDDI/au, NTT docomo, or SoftBank, depending on the plan. Every plan supports 5G. Data is cheapest on Japan Unlimited-10Mbps 3Days (KDDI) (999 GB for 3 days at $8.74): $0.01 per GB. Buy online, get the QR code by e-mail, and keep your physical SIM in the phone.

  • From $0.99
  • Valid 3–365 days
  • Networks: KDDI/au, NTT docomo, SoftBank
  • 5G

Not sure how much data you need?

Answer three short questions and we will suggest a plan for the length of your trip and what you use your phone for.

Help me choose a plan

The cheapest plan in each size

Show and filter all 84 plans →

Every plan, by data allowance

Up to 1 GB16 plans from $0.99
1–5 GB32 plans from $2.74
5–20 GB23 plans from $8.99
More than 20 GB13 plans from $8.74

Before you travel – Japan

  • How much data

    A week of maps, translation and social media usually fits in 3–5 GB. Sharing data with a laptop or streaming video, take 10 GB or more.

  • Networks and speed

    Plans use KDDI/au, NTT docomo, or SoftBank, depending on the plan. Every plan supports 5G. Your phone picks the network itself; there is nothing to set up.

  • When validity starts

    Each plan says whether validity runs from installation or from first connection. Install the eSIM accordingly.

  • Calls and texts

    Plans are data only. Call over WhatsApp, FaceTime or Messenger. Texts from your bank still reach your home SIM if you leave it on and switch off only its data.

Questions about eSIMs – Japan

How much is an eSIM for Japan?

The cheapest plan costs $0.99. We offer 84 plans valid for 3–365 days.

Which networks does the eSIM use in Japan?

KDDI/au, NTT docomo, and SoftBank. Your phone connects to whichever is available; there is nothing to set up.

When does the plan start?

It depends on the plan: each one says whether validity runs from installation or from first connection.

Will the eSIM work on my phone?

iPhones from the XS onwards and most recent Android phones support eSIM, as long as the phone is not locked to one carrier. The Compatibility page tells you for sure.

What if I run out of data?

Open the eSIM in your account, tap Top up and pick another package. It goes on the same eSIM; nothing is reinstalled.

Does the plan work in neighbouring countries?

Some plans do, covering South Korea, China, Hong Kong SAR China, and Indonesia as well. Each plan lists the countries it covers.

Going anywhere else?

Japan eSIM — data without roaming bills | Semper online