EN
Airalo
5 GB · 15 days
$10.509.3/10
Read the Airalo reviewSaily eSIM Review for Japan (2026)
Saily is one of the eSIM providers most often considered for Japan. We read its published Japan offer: 12 plans from $3.99, compared below with the rest of the market.
Updated September 24, 2026Prices checked September 24, 2026
We may earn a commission if you buy through our links, at no extra cost to you. It never changes the computed ranking. Affiliate disclosure
All Saily plans for Japan
Score: 9.5/10 · #1/5
- Networks
- KDDI, SoftBank
- 5G
- Yes
- Hotspot
- Yes
- App
- Yes
- Top-up
- Not stated
- Phone number
- No
- Unlimited
- Yes
| Plan | Data | Validity | Price | Price/GB |
|---|---|---|---|---|
| Japan Unlimited 5 days | Unlimited | 5 days | $18.99 | — |
| Japan 1 GB | 1 GB | 7 days | $3.99 | $3.99/GB |
| Japan Unlimited 7 days | Unlimited | 7 days | $26.99 | — |
| Japan Unlimited 10 days | Unlimited | 10 days | $34.99 | — |
| Japan Unlimited 15 days | Unlimited | 15 days | $48.99 | — |
| Japan Unlimited 20 days | Unlimited | 20 days | $59.99 | — |
| Japan Unlimited 25 days | Unlimited | 25 days | $65.99 | — |
| Japan 3 GB | 3 GB | 30 days | $7.99 | $2.66/GB |
| Japan 5 GB | 5 GB | 30 days | $10.99 | $2.20/GB |
| Japan 10 GB | 10 GB | 30 days | $17.99 | $1.80/GB |
| Japan 20 GB | 20 GB | 30 days | $24.99 | $1.25/GB |
| Japan Unlimited 30 days | Unlimited | 30 days | $71.99 | — |
Alternatives to Saily
Yesim
5 GB · 30 days
$10.569.3/10
Read the Yesim reviewHolafly
Unlimited · 10 days
$36.506.2/10
Read the Holafly reviewWhat matters here
In Japan, Saily publishes KDDI and SoftBank as partner networks. 5G is announced. Hotspot sharing is allowed.
Saily offers both fixed-volume and unlimited plans for Japan, so it can fit a light user as well as a heavy one. Compare the price per GB of the fixed plans with the unlimited ones for your trip length.
Plans are managed in the Saily app. Plans are data only, without a Japanese phone number.
Our score for Saily is computed, not given: price for the need of each page, Japanese network, hotspot and options. That is why Saily can rank differently on a 3-day page and on a 30-day one. The duels linked below compare it one to one with each alternative.
Download offline maps of the areas on your route: they keep working when the signal drops in tunnels or remote valleys.
Guides on this site
How much data do you need?
Pick your trip length and how you use your phone. The assumptions are visible and editable.
Install your eSIM in 4 steps
- 1
Buy the plan before you leave and keep the QR code or the app handy.
- 2
Install the eSIM at home on Wi-Fi. Most plans only start the validity period once the eSIM connects in Japan.
- 3
On landing, switch the eSIM on for mobile data and keep your home SIM for calls and texts if you need them.
- 4
Turn on data roaming for the eSIM line, then check that the phone shows a Japanese network.
Your phone must be carrier-unlocked and eSIM-compatible. Check this in your phone settings before you buy.
Frequently asked questions
Is Saily good for Japan?
Saily ranks #1 in our comparison for a typical trip, based on its published Japan plans from $3.99. The pros and cons above come from what it publishes.
Which network does Saily use in Japan?
Saily publishes KDDI and SoftBank for Japan. Coverage is good in cities with all major Japanese networks.
Does Saily allow hotspot in Japan?
Yes, Saily publishes hotspot sharing as allowed; some plans may cap the shared volume per day.
What are the alternatives to Saily?
The alternatives section above lists the next best providers in our ranking, and each duel page compares two providers side by side.
Do I need Wi-Fi to activate a Japan eSIM?
You need an internet connection to download the eSIM profile, so do it on Wi-Fi before the trip. Once installed, the eSIM connects to a Japanese network by itself when you turn on data roaming for that line.
Can I keep my own number while using the eSIM?
Yes. Most phones run two lines at once: keep your usual SIM for calls and texts and use the Japan eSIM for data. Turn off data roaming on your home line to avoid charges.
Top pickSaily · $10.99See this plan