Best eSIM for Japan Travel 2026 (top eSIM providers)
March 13, 2026 Update: We have updated the data plans and pricing for various eSIM providers, along with the latest changes in supported Japanese carriers for each service.
Japan’s mobile network is known for its strong coverage and fast speeds. The main carriers today are NTT Docomo, SoftBank, and au by KDDI.
Docomo is usually seen as the carrier with the widest coverage, especially in rural areas.
SoftBank offers fast speeds in most cities and is popular among heavy data users.
KDDI/au also provides strong nationwide coverage and stable performance.
All three networks support modern 4G and 5G service, but coverage can vary depending on where you travel and the type of plan you use.
Because buying a physical SIM on arrival can be time-consuming, many travelers now choose travel eSIM plans. They are quick to activate, easy to set up, and let you connect as soon as your plane lands.
In this guide, I compare the best eSIM options for Japan and help you choose the one that fits your trip.
Summary of the best eSIMs for Japan
| eSIM | Rating | Network in Japan | 10GB Price (USD) | Top up |
|---|---|---|---|---|
| esimNB | 4.9 ⭐⭐⭐⭐⭐ | NTT Docomo (5G), Rakuten Mobile (5G), KDDI/au (5G), SoftBank (5G) | $9.50 | ✅ Available |
| Holafly | 4.7 ⭐⭐⭐⭐⭐ | KDDI, Softbank | $3.90/day | ✅ Available |
| Ubigi | 4.6 ⭐⭐⭐⭐ | KDDI (5G), NTT Docomo (5G) | $16.50 | ✅ Available |
| Gigsky | 4.5 ⭐⭐⭐⭐ | Not mentioned | $40.49 | ✅ Available |
| Sakura mobile | 4.5 ⭐⭐⭐⭐ | KDDI, NTT Docomo | $32.26/7days | ✅ Available |
Best eSIM for Japan: detail guide
1. esimNB
✅ Top-up & hotspot avaliable
✅ Supports over 140+ countries
✅ Plans start from $1.50
2026 Update: esimNB Japan eSIM has significantly upgraded its service by adding two more Japanese carriers this year. It now supports all major mobile operators in Japan—all with 5G connectivity. Best of all, pricing remains unchanged, solidifying its position as the most cost-effective eSIM provider on the market right now.
esimNB’s Japan eSIM works on Japan’s major networks, NTT Docomo, Rakuten Mobile, KDDI and SoftBank, and both support 5G speeds. esimNB Japan eSIM now supports all major Japanese carriers in 2026. This means a significant leap in signal quality and network coverage, delivering an outstanding connection experience across the country. Not only in big cities like Tokyo and Osaka, but also in remote areas, the signal is good.
esimNB mainly offers fixed-data plans, ranging from small 1GB options to larger 50GB packages. This makes it easy for different types of travelers to choose the amount of data they need.
Here is the price list of Japan eSIM：
| Destinations | Data Plans | Duration | Price (USD) |
|---|---|---|---|
| Japan | Total 1GB | 7 days | $1.50 |
| Japan | Total 3GB | 30 days | $4.00 |
| Japan | Total 5GB | 30 days | $5.50 |
| Japan | Total 10GB | 30 days | $9.50 |
| Japan | Total 20GB | 30 days | $16.50 |
| Japan | Total 50GB | 30 days | $56.50 |
You can install your eSIM by QR code or manual setup. After you buy it, you can find it under “My eSIM”, where you can also check your data usage and plan validity at any time.
If you are visiting Japan for about 1-2 week and plan to watch YouTube or scroll Instagram as usual,
the Japan eSIM 10GB / 30 Days plan is a good choice. It costs USD 9.50, and 10GB is enough for most medium-level users.
If you think you may run out of data, you can check your usage in your account at any time and top up when needed.
If you have trouble using your eSIM, esimNB provides both self-help guides and supports like email or whatsapp.
2. Holafly
Holafly’s Japan eSIM only offers unlimited data plans, and you can buy them by the number of days you need. One day costs USD 3.9, and the price becomes cheaper when you buy more days at once.
| Destinations | Duration | Data Plans | Price (USD) |
|---|---|---|---|
| Japan | 1 days | unlimited | $3.90 |
| Japan | 3 days | unlimited | $11.70 (3.9/day) |
| Japan | 7 days | unlimited | $27.30 (3.9/day) |
| Japan | 30 days | unlimited | $74.90 (2.5/day) |
| Japan | 50 days | unlimited | $96.90 (1.94/day) |
The Holafly Japan eSIM works on both KDDI and SoftBank, and it supports 4G/5G service. So you can expect good signal strength and fast speeds.
One clear benefit of Holafly’s unlimited data plan is that it does not slow you down right away, even if you use around 3GB in a single day. This makes it a good choice for heavy data users.
If you use data continuously throughout the day, an unlimited plan is better because you are paying for days, not data.
But if you only use data from time to time, a fixed-data plan is usually a better match, since you pay for the data amount.
One thing to note: if you are traveling with family or friends, Holafly’s Japan eSIM is not ideal for hotspot sharing. It only supports up to 500MB per day for hotspot use.
Holafly’s eSIM setup guide is clear and easy to follow. It is one of the simplest guides among the eSIM providers I have tested, which is great for first-time users. Their live chat is also quick to respond, which makes the overall experience very smooth.
Read more:
3. Ubigi
2026 Update: Ubigi Japan's 5GB and 10GB eSIM plans have dropped in price by $0.50, with no other changes.
First, let’s look at the basic details of the Ubigi Japan eSIM. It works with two major Japanese carriers—KDDI and NTT Docomo—and supports both 4G and 5G networks. So you shouldn’t have big problems with signal or speed when using it in Japan.
Next is the price. The Ubigi Japan eSIM 10GB/30-day plan costs USD 16.50, which is a mid-range price. It’s not very cheap, but compared with other well-known eSIM brands, it’s still reasonable.
| Destinations | Data Plans | Duration | Price (USD) |
|---|---|---|---|
| Japan | Total 1GB | 3 days | $3.50 |
| Japan | Total 3GB | 15 days | $7.50 |
| Japan | Total 5GB | 15 days | $10.00 |
| Japan | Total 10GB | 30 days | $16.50 |
| Japan | Total 50GB | 30 days | $55.00 |
I checked Ubigi’s plans on their official website. Since the brand has been around for a long time, the website design feels a bit old, and different types of plans are mixed together, which can make choosing a little confusing.
Also, every time you choose a plan, the site takes you to a new page, and clicking “buy” opens another page again. All these loading steps make the buying process slower. Overall, Ubigi’s website could definitely improve the buying experience.
Ubigi Japan also launched a monthly subscription plan with 20GB of data per month for $19/month, which is cheaper than the corresponding fixed plan.
Since Ubigi has been in the market for many years, it has collected many user reviews. You can easily find Ubigi Japan eSIM reviews on Google, and most of them are positive.
However, a recent post on Reddit (Dec 2025) mentioned that some specific phone models—such as the Pixel 7, 9, and 10 series—might have unstable network connections and may only get LTE signal.
If you’re worried about this issue, I suggest buying a small plan first, such as 1GB. After you arrive in Japan and confirm everything works well, you can then buy more data or recharge.
4. Gigsky
Old(2025):
New(2026):
2026 Update: GigSky Japan eSIM has restructured its offerings by reducing the number of available plans and increasing prices. Notably, high-capacity options such as 50GB and 100GB have been removed, while remaining plan prices have risen by approximately $8 to $17.
I couldn’t find any information on Gigsky’s website about which carriers their Japan eSIM supports, and this is one of the main reasons why I ranked it in fourth place.
To ease users’ concerns, Gigsky offers a free plan for every new user: 100MB of data valid for 7 days. As long as you register a new account, you can claim and use it.
Gigsky only provides fixed data plans, ranging from 1GB to 50GB, but the prices are on the higher side.
| Destinations | Data Plans | Duration | Price (USD) |
|---|---|---|---|
| Japan | Total 100MB | 7 days | Free |
| Japan | Total 1GB | 7 days | $5.94 |
| Japan | Total 3GB | 15 days | $16.14 |
| Japan | Total 5GB | 30 days | $22.39 |
| Japan | Total 10GB | 30 days | $40.49 |
One unique advantage Gigsky has is that it offers special eSIM plans for cruise travelers. For example, Carnival Cruise Line, Disney Cruise Line, and MSC cruises all have their own dedicated plans. This is a nice benefit for users planning a cruise vacation.
5. Sakura mobile
Sakura Mobile is a local Japanese brand that focuses on internet services for travelers in Japan. They don’t just offer eSIMs—they also provide local SIM cards and portable WiFi devices.
The carriers and network quality they use are reliable, so there’s no issue there. The only downside is the price.
Among the brands mentioned above, Sakura Mobile is the most expensive.
One reason is that the final cost includes Japan’s consumption tax. For example, the 7-day unlimited data plan is priced at 5000 yen, and the tax is 500 yen. That tax alone is about USD 3.2.
You can also choose a 4G-only plan, which is 800 yen cheaper than the 5G version.
For example, the 7-day unlimited 4G plan costs 4620 yen in total, which is around USD 29.59.
If you’re very worried that using an eSIM might cause problems, then Sakura Mobile is a safe choice because it’s a local provider made specifically for travelers in Japan.
Otherwise, you can find cheaper options with better value.
Where to buy an eSIM for Japan
The easiest and most convenient way to buy an eSIM for Japan is through online eSIM stores. These platforms let you browse plans, compare prices, and activate your eSIM instantly.
One of the best places to buy a Japan eSIM is esimNB, a trusted online eSIM provider known for its simple setup, fast activation, and competitive pricing. You can choose from different data plans depending on how long you’ll stay in Japan and how much data you need.
Other online stores like Gigsky, Holafly, and Ubigi also offer Japan eSIMs, but esimNB often provides better value and more flexible packages, especially for travelers who want affordable and reliable connectivity.
Read more:
- How many eSIMs can an iPhone have? (2026 table list)
- Does MacBooks Support eSIM?
- How to Delete an eSIM from My iPhone in 2026
- How to Transfer eSIM to New Phone? A Complete Guide
How to make calls with an eSIM in Japan
Most Japan travel eSIMs—especially data-only plans from providers like esimNB, Airalo, Holafly, and Ubigi—do not include traditional voice calling or a local Japanese phone number. But you can still make calls easily using internet-based apps.
1. Use VoIP apps (the most common way)
With a data-only eSIM, you can make calls through apps such as:
- LINE (very popular in Japan)
- Messenger
- FaceTime / FaceTime Audio
- Skype
- Google Voice
As long as you have mobile data, these apps let you call anyone, even internationally.
2. Use WiFi Calling (if your home carrier supports it)
If your physical SIM is still active and supports WiFi Calling, you can make calls using your home number when connected to mobile data or WiFi.
This works well for receiving verification codes or staying reachable.
What’s the difference between travel eSIM and local SIM?
| Feature | Travel eSIM | Local SIM Card |
|---|---|---|
| Where to buy | Online (eSIM stores like esimNB) | Physical shops in Japan (airports, convenience stores, electronics stores) |
| Activation | Instant — scan a QR code | Requires inserting a physical SIM; sometimes needs ID verification |
| Convenience | Very high — no card swap, no store visit | Lower — must buy in Japan and replace your SIM |
| Keep your home SIM active | Yes, you can use dual SIM (great for banking SMS) | No, you must remove your home SIM unless your phone supports dual SIM |
| Voice calls / Japanese number | Mostly data-only, no local phone number | Can include a Japanese phone number |
| Best for | Short trips, tourists, business travel | Long stays (study, work, residency) |
| Price | Usually slightly higher | Often cheaper for long-term plans |
| Coverage | Uses major networks like Docomo / KDDI / Softbank | Same networks, similar performance |
| Setup time | 1–2 minutes | 5–15 minutes |
| Requires passport | No | Sometimes yes (depending on store and plan) |
Best eSIM for Japan– FAQs
1. Which eSIM is the best for (Japan and Korea) or (Japan and China) travel?
If you want a balance of price, speed, and reliability, esimNB (China+Japan+Korea) plan is one of the best choices. It offers affordable data plans, fast activation, and stable coverage using major Japanese networks.
2. Do Japan eSIMs have good coverage?
Yes. Most travel eSIMs use major Japanese networks such as Docomo, Softbank, or KDDI, which offer excellent nationwide coverage, including cities, towns, and most tourist areas.
3. Can I use an eSIM in Japan with my phone?
You need an unlocked phone that supports eSIM. Most newer models from Apple, Samsung, and Google support it. If you’re unsure, check your phone’s specs or your carrier’s website.
4. Do Japan eSIMs include voice calls?
Most travel eSIMs are data-only, meaning they don’t include traditional voice calls or a Japanese phone number. You can still call using apps like WhatsApp, LINE, or FaceTime.
5. When should I activate my Japan eSIM?
You can install the eSIM before your trip, but don’t activate the data until you arrive in Japan. Most plans start counting the validity period once the eSIM connects to a Japanese network.
6. Can I buy a Japan eSIM before I travel?
Yes. Buying online from providers like esimNB or Airalo lets you set everything up in advance. Activation takes only a few minutes.
7. Is a travel eSIM better than renting pocket WiFi?
For most travelers, yes. eSIMs are cheaper, easier to use, and don’t require carrying or charging an extra device. Pocket WiFi is only better for large groups sharing data.
8. How much data do I need for a Japan trip?
For light users (maps, messaging), 5–10GB is enough for a week.
For heavy users (YouTube, uploads), consider 15–25GB or unlimited plans.
9. Can I top up or recharge my Japan eSIM?
Most providers including esimNB, Airalo, and Ubigi allow easy top-ups. You can add more data anytime without reinstalling a new eSIM.
10. What if the eSIM doesn’t work when I land in Japan?
Try restarting your phone, enabling data roaming, and selecting the correct network.
If you are worried beforehand, buy a small plan first (e.g., 1GB) to test it before adding more data.
Conclusion: Which eSIM is best for Japan?
If you want a simple, hassle-free solution for a short trip, a travel-focused provider like esimNB is hard to beat. You can buy and activate the eSIM online before your trip, keep your home SIM active, and start using data as soon as you land.
Read more:
- Best eSIM for China in 2026 (travel eSIM providers)
- 5 Best eSIMs for Thailand Travel in 2026
- Best eSIM for Canada in 2026 (travel eSIM providers)
- Best eSIM for Vietnam in 2026 (Top travel eSIM providers)
- Guide to find the best eSIM for India in 2026
- Best eSIM for France Compared (Cheap & Good)
- Best eSIM for Mexico in 2026 (travel eSIM providers)
- 5 Best eSIMs for Spain Travel in 2026
- 5 Best eSIM for Korea (travel eSIM providers)
Un voyageur et aventurier chinois passionné par l’exploration du monde. En tant qu’INFJ, il est naturellement curieux de nouvelles expériences, cultures et idées. Chez esimNB, il est responsable du support client et de l’assistance technique, maintient une communication étroite avec les utilisateurs et partage des conseils de voyage pratiques ainsi que des guides eSIM utiles. Sa devise : être confiant, naturel, courageux et authentique.
Congrats 🥳
You've unlocked your exclusive 5% discount
Select eSIM Plan 
