ok: 7/7 collected providers current, Saily excluded
We don't show Saily prices: saily.com blocks automated price collection, so we cannot verify their prices weekly. Saily is excluded from this comparison as of 20 September 2026.
What is the best eSIM for Japan by trip cost?
The lowest price observed for USD checkout on .
Verdict
Jetpac at $16.00 and Nomad at $16.00 and Ubigi at $16.50 are about the same trip cost for 14d/10GB.
Prices checked:
Requires an eSIM-compatible, carrier-unlocked phone.
STAT | page=/best-esim-for-japan/ | scenario=14d/10GB | result=Jetpac | value=$16.00 | checked=2026-10-05
Trip-cost scenarios
7d/5GB
Prices checked:
| Result | Provider | Selected plan | Trip cost | Direct link |
|---|---|---|---|---|
| Tie | aloSIM | 5GB/7d | $9.50 | Check current plans select the 5GB plan |
| Tie | Jetpac | 5 GB 30d | $10.00 | Check current plans select the 5GB plan |
| Tie | Nomad | 5 GB 30d | $10.00 | Check current plans select the 5GB plan |
| Tie | Ubigi | 5GB 15d | $10.00 | Check current plans select the 5GB plan |
| Not winner-eligibleFair-use not verified | Maya Mobile | Global unlimited/7d | $19.99 | Check current plans select the 5GB plan |
14d/10GB
Prices checked:
| Result | Provider | Selected plan | Trip cost | Direct link |
|---|---|---|---|---|
| Tie | Jetpac | 10 GB 30d | $16.00 | Check current plans select the 10GB plan |
| Tie | Nomad | 10 GB 30d | $16.00 | Check current plans select the 10GB plan |
| Tie | Ubigi | 10GB 30d | $16.50 | Check current plans select the 10GB plan |
| Compared | aloSIM | 10GB/15d | $18.00 | Check current plans select the 10GB plan |
| Not winner-eligibleFair-use not verified | Maya Mobile | Global unlimited/14d | $27.99 | Check current plans select the 10GB plan |
30d/20GB
Prices checked:
| Result | Provider | Selected plan | Trip cost | Direct link |
|---|---|---|---|---|
| Lowest | Nomad | 20 GB 30d | $23.00 | Check current plans select the 20GB plan |
| Compared | aloSIM | 20GB/30d | $25.00 | Check current plans select the 20GB plan |
| Compared | Jetpac | 30 GB 30d | $29.99 | Check current plans select the 20GB plan |
| Compared | Ubigi | 25GB 30d | $32.00 | Check current plans select the 20GB plan |
| Not winner-eligibleFair-use not verified | Maya Mobile | Global unlimited/30d | $49.99 | Check current plans select the 20GB plan |
Will it work when I land?
- Jetpac — Declared network(s): KDDI, Rakuten, the networks the provider lists · Source checked 2024-05-11 · Mapping scope: destination-wide.
- Maya Mobile — Declared network(s): KDDI, Rakuten, NTT Docomo, the networks the provider lists · Source checked 2024-05-11 · Mapping scope: destination-wide.
- Nomad — Declared network(s): KDDI, SoftBank, the networks the provider lists · Source checked 2024-05-11 · Mapping scope: destination-wide.
- Ubigi — Declared network(s): KDDI, NTT Docomo, the networks the provider lists · Source checked 2024-05-11 · Mapping scope: destination-wide.
- aloSIM — Declared network(s): KDDI, the networks the provider lists · Source checked 2024-05-11 · Mapping scope: destination-wide.
Fair-use truth
FUP source checked:
- Maya Mobile: 3GB of full-speed data per day on Global unlimited/7d. Evidence level: generic. Fair-use not verified
Promo
No promo code needed — compare the observed USD checkout price directly.
FAQ
What does the default-scenario comparison show?
The verdict and scenario table show the current canonical comparison.
When were these prices checked?
Prices checked: .
What is not compared?
Not compared on:
- hotspot policy
- 5G access
- KYC
- activation start
- refund terms
Methodology and next comparisons
Read the comparison methodology or download the canonical data.
This page answers which eSIM fits a Japan trip on purchase cost, not which brand wins an abstract popularity contest. We price the qualifying purchase for a week, a fortnight, and a month so you can select the case closest to your itinerary. That distinction matters when a short city break needs occasional navigation but a longer rail itinerary adds translation, reservations, hotspot use, and repeated map loading.
Reading the Japan table
A qualifying plan lasts through the chosen scenario and supplies at least its target allowance; a cheaper-looking bundle that expires early or lacks enough data is not substituted. For an unlimited label, the fair-use line reports the real daily full-speed ceiling we can substantiate, followed by the possibility of throttling. “Fair-use not verified” warns that the threshold evidence is too generic or unclear for winner selection. Page-level links lead to a Japan catalogue, so you must choose the displayed variant yourself. The checkout result may shift with currency conversion, tax treatment, page-specific campaigns, or promotion turnover. We place the date of our weekly price snapshot directly beside each table so you can judge freshness before opening a seller.
Networks, setup, and route reality
Different travel eSIM sellers may hand your phone to the same Japanese host network even when their package names and billing rules look unrelated. They can still differ in validity, replenishment, traffic management, support flow, and activation timing. A network shown here is one the provider declares; it is not our independent measurement of platforms, tunnels, rural roads, or a particular building. Activate under the provider’s instructions before flying, save the installation details offline, and confirm which line supplies mobile data. You need an eSIM-compatible, carrier-unlocked handset. Coverage questions should be checked against the named local operator and the places on your own route.
Japan eSIM questions
How much data should I plan for in Japan?
Start with your habits: offline maps and downloaded media reduce demand, while live translation, video, cloud photo backup, and laptop tethering increase it. Choose the scenario that absorbs those activities without relying on an emergency top-up.
Will one eSIM cover every stop?
Not necessarily. Provider-declared host networks describe a commercial roaming arrangement, not continuous service. Compare the relevant operator map with cities, rail corridors, islands, and rural legs in your itinerary.
When should I install it?
Install before departure on dependable Wi-Fi and follow the stated activation trigger carefully. Avoid turning on the travel line too early if the provider says validity begins on activation rather than first local connection.
Can I keep my usual messaging account?
Usually a data connection can support internet messaging tied to your existing account, but a data-only eSIM does not automatically provide conventional voice or text service. Verify the product inclusions.