Best eSIM for Japan
We make Ryvo, so this page is our own case rather than an outsider's verdict.
We wrote down what we rank on before we ranked anything, linked every competitor fact to that provider's own page, and said where somebody else is the better buy.
Ryvo costs less than Simify for the same data in Japan, and Holafly sells no fixed plan at all.
The table below sets our Japan plans beside theirs, with every limit printed next to the price and each competitor fact linked to the page we read it on and the day we read it.
How we ranked them
Is the limit printed beside the price
What the trip actually costs
What you can do with it
Whether we could check it at all
The plans side by side
| Provider | Plan | Data | After the cap | Hotspot | Top-ups | Price | Per day |
|---|---|---|---|---|---|---|---|
| RyvoWe make Ryvo | 5GB, 30 days | Data5GB | After the capData stops when it's used up. No slow-speed extra. | HotspotHotspot allowed | Top-upsTop up without reinstalling | PriceA$10.95 | Per dayA$0.37 |
| RyvoWe make Ryvo | 10GB, 30 days | Data10GB | After the capData stops when it's used up. No slow-speed extra. | HotspotHotspot allowed | Top-upsTop up without reinstalling | PriceA$24.95 | Per dayA$0.83 |
| RyvoWe make Ryvo | 20GB, 30 days | Data20GB | After the capData stops when it's used up. No slow-speed extra. | HotspotHotspot allowed | Top-upsTop up without reinstalling | PriceA$34.95 | Per dayA$1.17 |
| RyvoWe make Ryvo | 50GB, 30 days | Data50GB | After the capData stops when it's used up. No slow-speed extra. | HotspotHotspot allowed | Top-upsTop up without reinstalling | PriceA$49.95 | Per dayA$1.67 |
| RyvoWe make Ryvo | 100GB, 30 days | Data100GB | After the capData stops when it's used up. No slow-speed extra. | HotspotHotspot allowed | Top-upsTop up without reinstalling | PriceA$64.95 | Per dayA$2.17 |
| Holafly | Japan eSIM, 30 days | After the capAn operator fair usage policy may reduce the speed for no more than one day, and the original speed returns the following day. No data figure and no speed is published.6 October 2026 | Per day$2.46 | ||||
| Airalo | Japan eSIM, unlimited, 30 days | After the capOver 3GB in a day the speed is throttled to 1 Mbps for the rest of that day. The daily allowance resets every 24 hours, counted from the time the eSIM was activated.6 October 2026 | Per day€2.10 | ||||
| Simify | Japan 10 GB, 30 days | Top-upsTop-ups aren't available on fixed data plans yet, so until then you buy a new eSIM.6 October 2026 | Per dayA$1.63 |
Rows marked We make Ryvo come from our own plan data. Prices stay in the currency each provider published. Each date is the day we read that page.
Who should pick which
You have a rough idea how much data you use
Pick: Ryvo
A fixed total with its price per day beside it, and the amount you get before the speed drops written on the card.
For the same data in Japan our price is lower than Simify's.
You use a lot of data and want one price for the month
Pick: Airalo
Of the sellers that offer no total, Airalo is the only one here that publishes the daily amount at full speed and the speed after it, so you can work out what you are buying.
You want an Australian seller, in Australian dollars, with Afterpay
Pick: Simify
Simify is based in Sydney, prices in Australian dollars and takes Afterpay.
We do not take Afterpay.
You pay more per gigabyte for that.
See the Ryvo plans in this table
How we compared
What each rule checks
- Is the limit printed beside the price. A plan whose cap you can only find in a help centre is a plan you cannot compare. We rank a published cap above a vague one, and a vague one above none.
- What the trip actually costs. The total for the plan's own length, and that total divided by its days, in the currency the seller published.
- What you can do with it. Whether you can share the connection with a laptop, and whether you can add data without installing a second eSIM.
- Whether we could check it at all. A fact we could not find on the seller's own page stays blank. We would rather show a gap than fill it in.
How this page is built
Ryvo's rows are generated from the same plan data our Japan page and our checkout use, so a price or a limit here cannot disagree with what you are charged. A plan that goes off sale loses its row instead of going stale.
A competitor row is only what that provider publishes on its own page, in that provider's words, with the link and the date beside it. Where a provider publishes nothing, the cell says so. We do not quote reviews of ourselves, and we never write any.
We re-read these pages at least every three months. A test fails our build when any fact here is older than that, so a comparison cannot drift quietly.
The table itself is a reference, not the ranking. It lists our own plans first, then each rival in the order this page cites them, so you can find a row rather than read an argument into its position. The ranking that takes judgement is the pick section above, measured against the four rules listed at the top.
Two gaps are left open on purpose. Airalo's Japan page served us only plans sold with no data total, so its fixed-data prices are missing here instead of remembered. And Simify publishes nothing about what happens once a fixed plan's data is gone, so that cell stays blank.
Per day is the published total divided by the plan's own days, rounded to the nearest cent. Prices stay in the currency each provider published, because a rate we picked on the day is not a price anyone published.
Where the competitor facts come from
- Holafly Japan eSIM page, Checked 6 October 2026
- Holafly FAQ, eSIMs with unlimited data, Checked 6 October 2026
- Airalo Japan eSIM page, prices served in euro, Checked 6 October 2026
- Airalo unlimited data plans fair use policy, Checked 6 October 2026
- Simify Japan eSIM page, Checked 6 October 2026
Questions about this comparison
Is this comparison independent?
No.
Ryvo is ours, so read it as our case checked against the other sellers' own pages.
Every competitor fact here links to the page we read it on, with the date, so you can check it yourself in a minute.
Why do some plans have nothing written in the cap column?
Because that seller does not publish it.
A plan sold with no data total still slows down at some point.
Where the amount and the speed are published we print both, and where they are not we say the seller does not publish them.
Why are the prices in different currencies?
Each price is in the currency that seller published on the day we looked.
Converting them would put a rate we chose on the page, which would be the one number on it nobody else could check.
Is Airalo cheaper than Ryvo on a fixed amount of data?
We could not check.
Airalo's Japan page served us only plans with no data total on the day we read it, so its fixed-data prices are not in the table.
We have left the comparison out rather than quote a number from memory.
Can I share a Ryvo plan with my laptop?
Our cards state only what the supplier has confirmed to us.
Where hotspot use is still unconfirmed the card says so instead of promising it, and the table above repeats that same wording.
Read the card before paying if tethering matters to you.
What happens when the data runs out?
On a fixed total the data stops and nothing is charged automatically.
Where a plan supports a top-up you add more to the eSIM already in your phone, and where it does not you buy another one.
The top-ups column says which is which.
Should I buy before I fly?
Yes.
Installing needs an internet connection, and an airport is a poor place to discover that.
Install at home on Wi-Fi, and where a plan only begins once it first connects abroad, the clock waits for you to land.
The card names the rule.
Which Japanese networks would I be on?
Our Japan page shows the operators our supplier has confirmed, as chips beside the coverage map.
We print their names and nothing about bars or speeds, because no seller can promise reception inside a mountain tunnel.
Which Japan plan should I buy from Ryvo?
Pick the total that matches the way you use data at home.
If you are not sure, our Japan page turns a daily amount into hours of maps, messaging and video, so you can judge it before you pay.
In short
Ryvo is the pick for Japan if you have a rough idea how much data you use, because the total and the price per day sit on the card.
Airalo is the one to buy if you would rather not think about a total, since it publishes both the daily full-speed amount and the speed after it.
Simify is the pick for Afterpay in Australian dollars.