Cheap eSIM for Japan: 3 GB, 5 GB and 10 GB prices (2026)

eSIM plans for Japan by gigabytes: price, validity and price per GB

All the fixed data plans on sale for Japan on 10 October 2026, sorted by gigabytes and then by days of validity.

Roam2Go prices updated on 10 October 2026. Prices may vary; always check the product page before purchasing.

Prices in euros, VAT included. Each row shows the data of the plan and its days of validity; “Per GB” is the price divided by the gigabytes. If the shop shows you another currency (US dollars, Canadian dollars or pounds sterling, depending on where you connect from), you see the final amount before paying. See these plans on the product page.

Not sure how much data you will use? The eSIM product page for Japan also has unlimited plans, sold by number of days.

Japan eSIM 10 GB · 15 days: €8.95 (€0.90/GB)

Price checked on 10 October 2026: for two weeks in Japan, the Roam2Go eSIM with 10 GB for 15 days costs €8.95, VAT included.

Japan eSIM 10 GB · 30 days: €8.99 (€0.90/GB)

Price checked on 10 October 2026: for a month in Japan, the Roam2Go eSIM with 10 GB for 30 days costs €8.99, VAT included.

Japan eSIM 20 GB · 30 days: €13.50 (€0.68/GB)

Price checked on 10 October 2026: for a month in Japan, if you use more data, the Roam2Go eSIM with 20 GB for 30 days costs €13.50, VAT included.

How many gigabytes do you need?

As a guide only: your own use may differ, and your phone’s settings show how much mobile data you used last month.

• Maps, messaging and email: these use little data. 1 to 3 GB usually covers a week.
• Social media with photos and some video: 5 to 10 GB for a week is a common range.
• Video streaming or video calls on most days: 20 GB or more, or an unlimited plan.

Examples from the table, by length of trip:

• A week: 3 GB for 10 days (€3.99).
• Two weeks: 10 GB for 15 days (€8.95).
• A month: 10 GB for 30 days (€8.99), or 20 GB for 30 days (€13.50) if you use more.

What about roaming with your home plan?

The EU “roam like at home” rule applies in the EU countries, in Iceland, Liechtenstein and Norway, and in Moldova and Ukraine. Japan is not covered, and the European Commission warns that roaming outside the EU/EEA, data roaming in particular, can be expensive. Wherever your SIM is from, what you pay to roam in Japan is set by your own operator, so check it before you leave. With a prepaid eSIM you know what you will pay before you travel.

How the eSIM works: installation and validity

1. At home: check that your phone supports eSIM (there is a device check on the product page) and that it is not locked to an operator, buy the plan and install the eSIM over Wi-Fi. The instructions arrive by email.
2. Validity: it does not start when you install the eSIM, but the first time it connects to a network in Japan.
3. Data roaming on the eSIM: switch it on before you go. It is only a setting, and on the eSIM it costs nothing extra.
4. When you arrive: choose the eSIM line for mobile data. If it is not online after a couple of minutes, restart the phone.
5. Your usual SIM: turn data roaming off on that line. It can stay active to receive calls and texts, but in Japan your operator can charge you for calls you make, calls you receive and texts.

You can call home through WhatsApp or another app, using the eSIM’s data and keeping your usual number: these plans are data only.

Refunds, top-ups and the other conditions are in the terms and conditions.

Sources: European Commission, roaming in the EU, accessed on 10 October 2026. Plans, validity and prices: Roam2Go catalogue as of 10 October 2026.

Frequently asked questions

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