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Saily
Unlimited · 7 days
$26.99
See this planBest Unlimited eSIM for Japan (2026)
If you work online, share a hotspot or simply hate running out, an unlimited eSIM is the calm option. For a one-week trip the lowest published price is $26.50 with Airalo; Saily ranks first on our score.
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
At a glance
Airalo
Unlimited · 7 days
$26.50
See this planAiralo
Unlimited · 7 days
$26.50
See this planPlans compared for this trip
Plan shown: the cheapest plan of each provider that covers at least 7 days with unlimited data. Tap a column header to sort.
Detailed ranking
- 1
Saily
Plan for this page: Unlimited · 7 days
9.7/10- Price
- $26.99
- Price/GB
- —
- Networks
- KDDI, SoftBank
- Hotspot
- Yes
Pros
- Hotspot allowed
- Two or more Japanese networks published
- Wide choice of plan sizes
- 2
Holafly
Plan for this page: Unlimited · 7 days
9.6/10- Price
- $27.50
- Price/GB
- —
- Networks
- KDDI, SoftBank
- Hotspot
- Yes
Pros
- Hotspot allowed
- Two or more Japanese networks published
- Unlimited plan available for Japan
- 3
Airalo
Plan for this page: Unlimited · 7 days
9.3/10- Price
- $26.50
- Price/GB
- —
- Networks
- SoftBank, KDDI
- Hotspot
- Not stated
Pros
- Lowest price on this page
- Two or more Japanese networks published
- Top-up without a new eSIM
Cons
- Hotspot policy not stated
- 4
Yesim
Plan for this page: Unlimited · 7 days
8.9/10- Price
- $29.40
- Price/GB
- —
- Networks
- KDDI
- Hotspot
- Yes
Pros
- Hotspot allowed
- Wide choice of plan sizes
- Unlimited plan available for Japan
What matters here
Unlimited plans suit travelers who stream video, upload a lot of photos, share their connection with a laptop or another phone, or work remotely. For maps, messaging and train times, a fixed plan is almost always cheaper.
Many unlimited offers apply a fair-use rule: full speed up to a daily threshold, then a slower connection until the next day. That is still enough for maps and messaging, but check the plan conditions on the provider’s site if you plan to stream in HD.
Hotspot rules matter even more on unlimited plans. Some providers allow sharing without restriction, others cap the shared volume per day. The table above shows what each provider publishes.
The comparison uses plans that last at least a week, a common trip length. Longer unlimited plans usually cost less per day, so look at the review pages if you stay two weeks or more.
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
What is the cheapest unlimited eSIM for Japan?
For a trip of at least a week, the cheapest unlimited plan published today is Airalo at $26.50. Prices were checked on September 24, 2026.
Which unlimited eSIM is best for Japan?
On our score Saily ranks first at $26.99. The score weighs price, network, hotspot and options; the formula is under the ranking.
Are unlimited plans really unlimited?
Many unlimited plans apply a fair-use rule and slow the speed after a daily threshold. Read the plan conditions on the provider’s page; Airalo currently has the cheapest unlimited option here at $26.50.
Can I share the eSIM data with another device?
Some providers allow hotspot sharing and some limit or do not mention it. The table above shows what each provider publishes; when it says “Not stated”, check the plan page before you rely on tethering.
Can I set up the eSIM before leaving home?
Yes, and it is the easiest option: scan the QR code or use the provider’s app on Wi-Fi before departure. Most plans only start counting days when the eSIM first connects in Japan.
Do Japan travel eSIMs include a phone number?
Most travel eSIMs sold for Japan are data only. You can still call through apps such as WhatsApp or FaceTime, and keep your home SIM active for texts.
How we rank
We compare the plans each provider publishes for Japan. We do not rank on personal testing or user reviews. For each provider we take the cheapest plan that covers the need of this page, then compute a score out of 10:
- Price (50%): cheapest plan on the page ÷ this plan’s price × 10.
- Japanese network (20%): 10 if two or more networks are published, 8 for one, 5 if unknown.
- Hotspot (15%): 10 if tethering is allowed, 0 if not, 5 if unknown.
- Options (15%): app, top-up and an unlimited plan for Japan (10 each if yes, 0 if no, 5 if unknown).
At equal score, providers we have a partner link with are listed first. Prices change often, so check the final price on the provider’s site.
Top pickSaily · $26.99See this plan