Compared: The best eSIM for Japan in 2025
Japan has become a hotspot for Australian tourists — and with good reason.
A trip to Japan offers a unique blend of tradition and modernity, natural beauty, and cultural richness.
If you are planning a trip to Tokyo or beyond, you’ll need some mobile data.
So what is the best Japan eSIM in 2025?
Here’s a guide, including some top options to consider.
How does an eSIM in Japan work?
Using an eSIM in Japan is a convenient way to stay connected while travelling.
An eSIM is a virtual SIM card installed on a mobile phone that allows you to access mobile data while travelling.
If you have a physical SIM for your Australian mobile number, you can leave it in your phone and use an eSIM in conjunction with it.
For most providers, this means that you can still receive text messages for free on your Australian phone number while using data from your travel eSIM.
An eSIM can be purchased and activated before you leave home so that you can have access to data as soon as your plane lands in Japan.
Japan eSIM v Telstra International Roaming
An eSIM for Japan can be a fraction of the cost of using roaming from your Australian mobile network.
For example, Telstra international roaming is $10 a day in Japan, for which you receive unlimited calls, SMS and 2GB of data per day.
Comparatively, an eSIM for Japan could cost you $1 a day or less, presenting savings of over $100 on a two-week trip.
What is the best travel eSIM for Japan in 2025?
The best eSIM for your trip to Japan ultimately depends on your data needs and the length of your trip, but there are a wide range of options.
Saily and Airalo are popular among Australian travellers and offer top coverage, while Klook provides great-value plans.
Roamless is handy if you are planning on taking further international trips in the near future given your data credit does not expire.
Saily
Saily is a great choice for travellers looking for a hassle-free and cost-effective way to stay connected while exploring Japan.
Saily comes from the team behind NordVPN and also has some built-in security features that provide greater privacy and security.
| Data | Days | Cost ($USD) |
|---|---|---|
| 1GB | 7 | $3.99 |
| 3GB | 30 | $6.99 |
| 5GB | 30 | $9.99 |
| 10GB | 30 | $15.99 |
| 20GB | 30 | $22.99 |
Basics
Networks: Not declared
Top-up Option: Available
Hotspot: Yes
Speed Cap: No.
Calls: No, data only
| Data | Days | Cost ($USD) |
|---|---|---|
| 1GB | 7 | $4.50 |
| 2GB | 15 | $6.50 |
| 3GB | 30 | $8.50 |
| 5GB | 30 | $11.50 |
| 10GB | 30 | $18.00 |
Basics
Networks: Sofbank (4G), KDDI (4G)
Top-up Option: Available
Hotspot: Yes
Speed Cap: No
Calls: No, data only
Klook
Known as a leading website for booking tours and attractions – particularly within Asia Pacific – Klook also offers some high-value eSIM plans for certain destinations including Japan.
| Data | Days | Cost ($USD) |
|---|---|---|
| 1GB | 7 | $1.50 |
| 3GB | 7 | $3.19 |
| 5GB | 15 | $5.85 |
| 10GB | 15 | $10.65 |
| Unlimited | 7 | $17.90 |
| 10 | $25.95 | |
| 15 | $34.20 |
Basics
Networks: Docomo (4G/5G)
Top-up Option: Available
Hotspot: Yes
Speed Cap: 384kbps for Data Per Day and Unlimited plans after the daily limit is reached
Calls: No, data only
Roamless
A provider that does things a little bit differently, Roamless lets you purchase credit which then provides data in more than 180 destinations worldwide.
The good thing is that the credit does not expire – handy if you have multiple international trips on the horizon.
Roamless also allows you to make cheap VOIP calls within its app.
| Data | Days | Cost ($USD) |
|---|---|---|
| 1GB | Unlimited | $3.45 |
| 2GB | $6.90 | |
| 3GB | $10.35 | |
| 5GB | $17.25 |
Basics
Networks: SoftBank (5G), NTT DOCOMO (5G)
Top-up Option: Available
Hotspot: Yes
Speed Cap: No
Calls: Yes, in app
Summary
Saily, Airalo, Klook and Roamless are four of the best eSIM options for a trip to Japan, providing convenience and strong coverage for your trip. An eSIM for Japan can save you a significant amount on international roaming charges, giving you more spending money during your travels.
Written By: Chris
Updated: February 2025
FREQUENTLY ASKED QUESTIONS
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Yes, Docomo is Japan’s largest and most reliable mobile network, providing high-quality coverage across the country.
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The price of an eSIM for Japan depends on your mobile data requirements. However, some plans can be purchased for less than $1 a day. This can be a fraction of the cost of paying international roaming fees to your Australian mobile provider.
