The best eSIM for Japan in 2026.
Tokyo neon to Kyoto temples — flawless data on the golden route. Judged the way a traveller would: real per-day pricing, honest comparisons, and setup that takes two minutes at home.
Unlimited data · 30-day refund promise· updated July 2026
Our picks by trip type.
City break
5 days · 1gb
Long weekend or short hop — Japan at the standard day rate.
£0.57/day · £2.86 total
Choose this planMost popular
The classic holiday
10 days · 5gb
The most popular pick for Japan — 10 days with a discounted day rate.
£0.78/day · £7.79 total
Choose this planLong stay
30 days · 5gb
A month at the deepest discount — made for slow travel and remote work.
£0.26/day · £7.79 total
Choose this planEach pick shows the best-value plan covering that trip length, hotspot included. Unlimited-data plans are also available. Every option is on the Japan page.
What makes an eSIM the best choice for Japan?
Three things decide it: a price agreed before you fly, data that doesn't run out mid-trip, and a setup you can finish at home. A prepaid unlimited travel eSIM answers all three — from £2.35 per day in Japan, with the QR code in your inbox seconds after ordering.
Japan runs on QR codes and maps — from ramen-shop queues to Shinkansen seats. Unlimited data is the right call here.
eSIM vs the old ways in Japan
eSIM
ROAMING
AIRPORT SIM
Data allowance
Unlimited
Usually capped
Rarely unlimited
Price known upfront
Yes Prepaid
Billed after
Varies at the desk
Ready when you land
Yes Instantly
Yes
After the queue
Keep WhatsApp number
Yes
Yes
No SIM swapped
Japan eSIM from £2.35/day — the whole bill, agreed before you fly.
30-day refund promiseUnused, uninstalled eSIM? Full refund, no questions.
The price is the billPrepaid and final — roaming charges can't happen.
Days start when you landInstall early with zero pressure; counting begins at first connection.
Humans, 24/7Real people answer, before, during and after the trip.
Quick answers.
Yes — Japan's networks are excellent along rail corridors and underground in major metro systems, so navigation and messaging keep working on the move.
Worth reading before you fly.
Nearby holidays.
Japan eSIM from £2.35/dayUnlimited data · instant deliveryChoose days