How much eSIM data for 7 days in Japan?
For 7 days in Japan with normal daily use, TripUtils estimates 3–5 GB. A 5 GB plan is the usual buffer. Not a live price. Maps, translation and train apps sit in the normal daily setting. Hotel Wi‑Fi is not counted. Japan’s 100 V Type A/B sockets are a packing check, not an eSIM issue.
Photo: 王 奕鈞 / PexelsTravel essentials in Japan
The four things that save the most money or hassle before you go.
eSIM for Japan
Mobile data in Japan from the moment you land, instead of costly roaming. Install before you fly.
See Saily plans →Airport transfer
Pre-book a ride from the airport to your stay – or compare with a taxi or public transport on arrival.
Find a transfer →Tours & tickets
Attractions, tours and activities in Japan – compare prices on more than one site.
Browse Klook →Flight delayed?
3+ hours late or cancelled? Up to €600 per passenger under EU261, depending on distance.
Check claim (AirHelp) →Affiliate links: TripUtils may earn a commission at no extra cost to you. Affiliate disclosure. TripUtils does not show live prices.
What to do next
EU roaming does not cover Japan. A 5 GB plan is the usual buffer. Open Saily and pick a live Japan plan.
Roaming in Japan on an Austrian plan: what A1 and Drei charge
Japan is outside EU roam-like-at-home, so the EU data in an Austrian plan does not apply there. Published prices, checked on 22 Oct 2026 (euros incl. VAT):
| Network | Option | Data | Price |
|---|---|---|---|
| A1 | Roaming Pass (Zone 2) | per started GB | €5.90 |
| Drei | Roaming-Paket Go | 1 GB, 15 days | €5.00 |
| Drei | Roaming-Paket Go Select | 5 GB, 15 days | €10.00 |
For the 5 GB planning size (7 days), A1’s Roaming Pass would bill 5 × €5.90 = €29.50; on Drei, 1 package (Go Select) cover it for €10.00. A1 says the Roaming Pass is switched on automatically for every tariff signed since 24 June 2026, and it blocks roaming data at a default limit of €60, which you can raise yourself.
Magenta prices depend on the tariff — look them up in Magenta’s roaming finder. Older tariffs without these options can cost more. Sources: A1, Drei, Magenta.
Planning size
| Habits | 7-day range | Planning size |
|---|---|---|
| Normal (maps, messages, social) | 3–5 GB | 5 GB |
| Normal + daily video | 7–11 GB | 15 GB |
Assumptions and sources
Light 0.20 / normal 0.50 / heavy 0.95 GB per day, plus optional extras, plus about 20% buffer. No live retail prices.
Cherry-blossom weeks and Golden Week raise hotel bands; data use does not change with the calendar.
These are planning ranges, not live prices.
Common questions
Is 5 GB enough for 7 days in Japan?
Maps, translation and train apps sit in the normal daily setting. Hotel Wi‑Fi is not counted. Japan’s 100 V Type A/B sockets are a packing check, not an eSIM issue. The 3–5 GB estimate plus buffer lands on 5 GB. Hotel Wi‑Fi is not counted. Streaming video on mobile is the usual reason to go larger.
Should I roam in Japan instead?
Japan is outside EU roaming. As of 22 Oct 2026, A1’s Roaming Pass bills €5.90 per started GB there (zone 2) and Drei sells 1 GB for €5 or 5 GB for €10, valid 15 days. Compare that with an eSIM quote for the same GB.
Do you show live Saily prices?
No. Live prices belong on the provider site. The numbers on this page are a data-size estimate only.