한국어 — this page is being translated and will be ready in a minute. Here it is in English for now.
View of Shinjuku skyscrapers and Mount Fuji as seen from the Bunkyo Civic Center in Tokyo
Travelmaxxing

Best eSIM for Okinawa, Japan

Okinawa eSIM

A guide says Naha and the main island are well covered, but smaller islands fade between villages and signal is effectively gone at sea.
Travel guide. Checked 3 Nov 2026.

  • KDDI/au5G
  • NTT docomo5G
  • Rakuten Mobile5G

How long is your Okinawa trip?

Get my Japan eSIM · $4.79
  • Apple Pay, Google Pay or card
  • One-tap install
  • Full refund if we can’t issue it

Photo: Morio, CC BY-SA 3.0

Pay, then open NUM: your install code is waiting in your chat, and we email it about five minutes after you pay. If we can’t issue it, you get a full refund.

Coverage in Japan: what to know

Opensignal rated NTT docomo strongest for coverage (9.0 of 10) and in rural areas, with au next (8.3). Rakuten Mobile won none of the coverage or availability awards and did not appear in the rural results.

Checked 3 Nov 2026. Sources: insights.opensignal.com, insights.opensignal.com. Coverage changes, so check your route before you rely on it.

The short answer

The best eSIM for Japan is the one that fits your trip and your networks. For two weeks of photos, maps and social, NUM picks 5 GB for 30 days at $4.79, as of 4 Nov 2026.

Plans from$0.79 on 4 Nov 2026
Networks on local plansKDDI/au, NTT docomo, Rakuten Mobile
7 days3 GB, 15 days, $3.39
14 days5 GB, 30 days, $4.79
30 days10 GB, 30 days, $6.89
45+ days50 GB, 180 days, $32.59
Phone numberNone, data only
PaymentApple Pay, Google Pay or card

How it works

  1. Pick your trip

    Choose 7, 14 or 30 days. The shop picks the data for how you use your phone, and shows the networks.

  2. Pay in seconds

    Apple Pay, Google Pay or a card. Then open NUM and join free: your install code is waiting in your chat.

  3. Install, then land online

    Install at home on wifi with one tap, switch it on as the plane lands, and you’re online walking off. Your home number stays on for calls and codes.

Japan eSIM for 7, 14 and 30 days

Japan eSIM for 7 days

$3.39

3 GB, valid 15 days on NTT docomo. Enough for maps, rides, messages and photos for a week.

Choose 7 days

Japan eSIM for 14 days

$4.79

5 GB, valid 30 days on NTT docomo. Room for social, photos and a few video calls over two weeks.

Choose 14 days

Japan eSIM for 30 days

$6.89

10 GB, valid 30 days on NTT docomo. A month of everyday use, with some streaming and hotspot.

Choose 30 days

Japan eSIM for longer trips

$32.59

50 GB, valid 180 days on NTT docomo. For long stays, remote work and heavy use.

Choose longer trips

NUM’s pick for each trip length on 4 Nov 2026, for photos, maps and social. Prices in US dollars; the price on the pay button is the price you pay.

How much data do you need in Okinawa?

Estimated data a day in Okinawa, by activityEstimated data a day: Maps and directions, 5–10 MB an hour, about 15 MB for 2 hours a day; Messages and browsing, 10–50 MB an hour, about 60 MB for 2 hours a day; Social feeds, 100–600 MB an hour, about 350 MB for 1 hour a day; Video calls home, 500 MB–1.5 GB an hour, about 500 MB for 0.5 hours a day; Streaming video, 300 MB–2 GB an hour, about 1000 MB for 1 hour a day.Maps and directions~15 MBMessages and browsing~60 MBSocial feeds~350 MBVideo calls home~500 MBStreaming video~1 GB
Estimates: two hours of maps and of messages, an hour of social, half an hour of video calls, an hour of video. Per-hour figures from esimcard.com; your phone and apps will differ.
Estimated data for a trip, by how you use your phone
How you use it7 days14 days30 days
Maps and messages1.4 GB2.8 GB6 GB
Plus social2.8 GB5.6 GB12 GB
Lots of video11 GB21 GB45 GB

Questions people ask about Okinawa

Is there mobile signal at Okinawa?

A guide says Naha and the main island are well covered, but smaller islands fade between villages and signal is effectively gone at sea.

How much does an eSIM for Japan cost?

On 4 Nov 2026, Japan plans started at $0.79 and went up to $32.59 for the biggest. The shop always shows today’s price, and the price on the pay button is the price you pay.

Which network works well in Japan?

Opensignal rated NTT docomo strongest for coverage (9.0 of 10) and in rural areas, with au next (8.3). Rakuten Mobile won none of the coverage or availability awards and did not appear in the rural results.

Why does my eSIM show another carrier’s name?

Many travel eSIMs are issued by one carrier and roam on local networks, so your phone can show the issuing carrier’s name while your data runs on a local network. Keep data roaming on for the eSIM.

Will it work on my phone?

Dial *#06# on the phone you’re taking. If you see an EID number, it takes an eSIM. Every iPhone from the XR and XS on does, and the SE from 2020, as do Google Pixel 3 and later and Samsung Galaxy S20 and later. The phone must be carrier-unlocked. Not sure? Text PHONE and your model and we’ll check.

When do I install it?

At home, on wifi, before you fly. Then switch it on when you land. Tell us your landing day and we text you the switch-on steps that morning.

Does it come with a phone number?

No. It’s a data-only eSIM. WhatsApp, LINE, iMessage and FaceTime all work over it, and your home number can stay on for calls and codes.

What if it doesn’t work?

If we can’t issue your eSIM, we refund you in full. If it won’t install or connect, text us and we help you get connected.

More of Japan

Japan eSIMfrom $0.79Get it