Japan · Price comparison
Cheapest eSIM for Japan: 4 providers compared
The same amount of data at 4 eSIM providers. For a short trip, 3GB costs from $3.04 at Computatus eSIM; for a month, 20GB costs from $14.68 at Computatus eSIM. Prices checked on September 27, 2026.
- Cheapest 3GB
- $3.04 Computatus eSIM
- Cheapest 20GB
- $14.68 Computatus eSIM
- Highest vs lowest, 3GB
- +$4.96 (163%)
- Prices checked
- September 27, 2026
3GB for Japan: a short trip
Enough for maps, messages and some browsing on a trip of a few days to a week. Ranked by price, lowest first.
| Rank | Provider | Price | Per GB | vs cheapest | View |
|---|---|---|---|---|---|
| 1 | Computatus eSIM Sponsor | $3.04 Cheapest | $1.01 | = | Buy |
| 2 | Nomad | $7.00 | $2.33 | +$3.96 (130%) | View |
| 3 | Saily | $7.99 | $2.66 | +$4.95 (163%) | View |
| 4 | Airalo | $8.00 | $2.67 | +$4.96 (163%) | View |
Choosing the cheapest instead of the most expensive saves $4.96 (62%).
20GB for Japan: a month
For a month away, remote work or sharing the connection with a laptop. Ranked by price, lowest first.
| Rank | Provider | Price | Per GB | vs cheapest | View |
|---|---|---|---|---|---|
| 1 | Computatus eSIM Sponsor | $14.68 Cheapest | $0.73 | = | Buy |
| 2 | Nomad | $23.00 | $1.15 | +$8.32 (57%) | View |
| 3 | Saily | $24.99 | $1.25 | +$10.31 (70%) | View |
| 4 | Airalo | $25.00 | $1.25 | +$10.32 (70%) | View |
Providers sell the same amount of data with different validity: check the number of days on the provider's page before you buy.
Head to head for Japan
Two providers at a time, for the same data:
| Head to head | 3GB | 20GB |
|---|---|---|
| Airalo vs Saily | Saily is $0.01 cheaper | Saily is $0.01 cheaper |
| Airalo vs Nomad | Nomad is $1.00 cheaper | Nomad is $2.00 cheaper |
| Saily vs Nomad | Nomad is $0.99 cheaper | Nomad is $1.99 cheaper |
| Computatus eSIM vs Airalo | Computatus eSIM is $4.96 cheaper | Computatus eSIM is $10.32 cheaper |
| Computatus eSIM vs Saily | Computatus eSIM is $4.95 cheaper | Computatus eSIM is $10.31 cheaper |
| Computatus eSIM vs Nomad | Computatus eSIM is $3.96 cheaper | Computatus eSIM is $8.32 cheaper |
eSIM prices for Japan: questions and answers
What is the cheapest eSIM for Japan?
On September 27, 2026, the cheapest 3GB eSIM for Japan was Computatus eSIM at $3.04. The most expensive of the 4 providers we checked charged $8.00.
How much does 20GB of eSIM data cost for Japan?
On September 27, 2026, 20GB for Japan cost from $14.68 at Computatus eSIM up to $25.00, depending on the provider.
Which eSIM is cheapest per GB for Japan?
Computatus eSIM, at $0.73 per GB with its 20GB pack. Larger packs usually cost less per GB.
Is Airalo or Saily cheaper for Japan?
For 3GB: Saily is $0.01 cheaper. For 20GB: Saily is $0.01 cheaper.
Why do prices for the same data differ so much?
Providers buy network access on different terms, and some sell the same amount of data with more days or extra features. The tables compare the price of the same amount of data only.
Are these prices final?
They are public list prices in US dollars from September 27, 2026, before discount codes. Providers change prices often, so the checkout page is the final word.
How we compare
Each price is the provider's public list price for the same amount of data, read from its own website on September 27, 2026, in US dollars and before any discount code. Tables are sorted by price only, and a provider without a price for a pack is left out of that table.