Are you planning on making a trip to Japan?
While there, you’ll want seamless internet access to apps like WhatsApp, Google Maps, Google Translate, or Instagram without any issues.
However, choosing between eSIM & physical SIM options can be challenging. Lack of information might lead to:
• Uncertainty about which type your phone supports.
• Running out of data too soon.
• Difficulty setting up your eSIM or SIM card without prompt customer support.
Don’t worry — we’ve got you covered! Keep reading to learn the basics of eSIMs & SIM cards. We’ll cover everything you need to know for a short-term stay (under 90 days), including data plans, prices, setup guides, customer reviews, & the top providers.
A simple comparison table of eSIM, SIM Card, and Pocket WIFI
This article covers information on eSIM & SIM cards for short-term stays (under 90 days). Please refer to the article below for information on long-term SIM cards (monthly contracts).
If you already know which product you want, you can head straight to the information here!
Table of contents
- What is an eSIM?
- What travelers in Japan need to know about eSIM
- The best 6 eSIM for traveling to Japan
- Things to keep in mind when choosing an eSIM
- Introduction to Physical SIM Cards
- What travelers in Japan need to know about physical SIM cards
- Top SIM cards for Japan Travel
- Key Factors when choosing a SIM card
- eSIM and physical SIM card vs. Pocket WiFi: Which is Best?
- eSIM and Physical SIM card FAQ
- Final Thoughts
TL;DR
Too busy to read the article? Here’s a summary!
Japanese eSIM Providers
- Best: Sakura Mobile
- Runner ups: Ubigi, AIS SIM2Fly
- Others: Nippon SIM, eSIM Japan, Flexiroam
Japanese SIM Card Providers
- Best: Sakura Mobile
- Runner ups: HIS Mobile, GENKI MOBILE
- Others: Any Fone JAPAN, b mobile, eConnect, SoftBank Global Rental
Click the image below to enlarge
1. What is an eSIM?
eSIM stands for ” embedded SIM,” which means the SIM card is built into the device. Many newer smartphones and tablets now support eSIM. Unlike a physical SIM card, an eSIM doesn’t need to be inserted or swapped; you can set it up online.
Before buying an eSIM, make sure your device supports it. For example, iPhone XS and later models (except those sold in Hong Kong) are compatible with eSIM.
Do you want to quickly check if your device is compatible with eSIM? If so, you can refer to the list in the article below.
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2. What travelers in Japan need to know about eSIM
Before you use an eSIM for your trip to Japan, here are two things you should know:
How to Get an eSIM for Your Japan Trip
Are you thinking of buying an eSIM for your trip from one of Japan’s major carriers (docomo, SoftBank, or au)? Unfortunately, they don’t offer short-term eSIM plans.
But don’t worry! You can get one from a Mobile Virtual Network Operator (MVNO). They use major carrier networks to offer short-term eSIM plans.
Sakura Mobile is one such MVNO. Please read through this blog and choose the eSIM plan that meets your needs.
About eSIM with phone numbers
While some companies may offer eSIMs with Japanese phone numbers, providing Japanese phone numbers to non-residents is challenging due to stringent regulations and security concerns. Furthermore, they might not work correctly.
Data-only eSIMs, however, are an excellent option for short-term travelers since they do not have legal issues. Their internet access allows making calls and chat using apps like WhatsApp.
Most short- and medium-term tourists don’t need a phone number, but if you need one for work purposes or applications to government agencies, please refer to the article below.
How to Get a Japanese Phone Number
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3. The 6 Best eSIM for Travel in Japan
Scroll right for more →→
Provider | Provider's country | Data Plan & Price | Days | English support | Reviews | Activation steps | Network | Topup | Extension | Cancel&Refund policy |
Sakura Mobile | Japan | ★4.5 3GB - 200 GB(Various plans) From 2000JPY(≒$13.7*) | ★4.5 3 days - 90 days | ★5 Phone Office(Tokyo) | 4.5 of 5 3492 Reviews(Yotpo) | QR issue link via Email *flexible to the start date | NTT docomo | 〇 | 〇 | 〇 |
Nippon SIM | Japan | ★3.5 10GB/30GB/50GB From 3280JPY(≒$22.5*) | ★3 180 days | ★3 Email only | Not found | QR code via Email | NTT docomo | not found | not found | △ |
eSIM Japan | Japan | ★4 3GB/5GB/10GB From $7.99 | ★3.5 3 days - 20 days | ★3 Email only | Not found | QR code via Emai | Not found | not found | not found | △ |
Ubigi | Overseas | ★4 500MB/1GB/10GB/50GB From $4.0 ~ $69 | ★3 30 days | ★3 Email only | 4.4 of 5from 5384reviews(Trustpilot) | Required to download certain App | NTT Docomo | 〇 | × | △ |
AIS SIM2Fly | Overseas | ★3.5 6GB 2,380JPY(≒$16.4) | ★3 8 days | ★4 Chat via FB messenger Phone | ★4.5 Reviews 488 (no source) | QR code via email | Unknown *Roaming plan from Thailand | not found | not found | △ |
Flexiroam | Oversea | ★4 500MB-10GB(Various plans) From $7.5~ $109.99 | ★5 3 days - 360 days | unknown *Chat via Whatsapp | Not found | Required to download certain App | Unknown | not found | not found | not found |
Japan Prepaid SIM Data: Comparing Limited vs. Unlimited Plans
So, which provider should you choose?
Did this table help you understand more about which eSIM provider you should choose?
Below, we will explain in more detail three companies that we highly recommend for your next trip.
Sakura Mobile
Provider | Sakura Mobile |
Provider's country | Japan |
Data Plan & Price | ★4.5 3GB - 200 GB(Various plans) From 2000JPY(≒$13.7*) |
Days | ★4.5 3 days - 90 days |
English support | ★5 Phone Office(Tokyo) |
Reviews | 4.5 of 5 3492 Reviews(Yotpo) |
Activation steps | QR issue link via Email *flexible to the start date |
Network | NTT docomo |
Top up | 〇 |
Extension | 〇 |
Cancel & Refund policy | 〇 |
While Sakura Mobile’s eSIM isn’t the cheapest option, it offers flexibility and up to 200 GB of data. You can also top up your data and extend your usage as needed. When choosing a provider, Sakura Mobile stands out.
Easy and Flexible with Travel eSIM
Let’s take a closer look at Sakura Mobile.
Comprehensive Plans
Sakura Mobile offers a variety of data plans, from 3 GB to 200 GB, with usage periods between 3 and 90 days. You’re sure to find a plan that fits your needs perfectly.
Year-round English Customer Support
Sakura Mobile’s English Customer Support is available 365 days a year. If you have any problems with your eSIM, you can quickly and easily get help.
High Customer Satisfaction Rating
Sakura Mobile’s website boasts over 3,000 positive reviews, making it one of the highest-rated and most reliable companies in the comparison table.
Japanese eSIM Provider
Sakura Mobile is a Japanese telecommunications provider that uses docomo’s network, Japan’s largest, to ensure high-quality communication. Besides offering a reliable network, Sakura Mobile is known for its exceptional and friendly customer service, a hallmark of Japanese hospitality. Additionally, with offices and stores in Japan, customers can easily access direct support from staff.
Sakura Mobile eSIM Reviews: What Customers Are Saying
While traveling in Japan, we have had customers who experienced frustration and stress while dealing with SIM cards and eSIMs. Although many companies in Japan offer similar telecom services, the same cannot be said for the English support and service that Sakura Mobile provides. Along with utilizing the largest telecom network in Japan, docomo, Sakura Mobile provides full English service from start to finish, helping customers with their orders and any technical issues that may ruin the trip. With support via phone, email, and chat, customers can enjoy their trip to the fullest without any worries and stress.
For real user feedback, please check the reviews from customers who have actually used Sakuramobile.
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Conclusion: Which eSIM provider should I choose?
Conclusion: Which eSIM provider should I choose?
- Best: Sakura Mobile
- Runner ups: Ubigi, AIS SIM2Fly
- Others: Nippon SIM, eSIM Japan, Flexiroam
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4. Choosing an eSIM: What to Know
Now that you understand eSIMs better, let’s go over a few important points to consider when choosing the best travel eSIM for Japan.
eSIM Activation
In most cases, you can activate your eSIM by scanning a QR code provided by your service provider. This QR code is usually sent via email or can be found in the provider’s app.
Flexibility: Extending Usage, Cancellation & Refunds, Adding Data, etc.
Unexpected changes can happen when traveling. For instance, you might fall ill after buying an eSIM and cancel your trip, or a one-week business trip might extend to two weeks. Sometimes, you may also use more data than expected and run out.
Signal/Service Coverage
The eSIM providers featured in this article use Japan’s major carrier networks, covering 99% of the population. However, be cautious when using your phone in rural areas, mountains, or underground.
If you are considering hiking in Japan, please refer to the article below.
Docomo Coverage Makes Climbing and Hiking in Japan Easier
English Language Support
Running into connection issues or needing clarification on settings can be frustrating, especially in another language. Choosing an eSIM provider with English customer support can make your experience smoother.
Here are some key points to consider:
- Contact Methods: Choose a provider offering both email and phone support. This allows you to call for emergencies and email for non-urgent matters.
- Availability: Many eSIM providers are closed on weekends, which can be inconvenient if you need assistance. It’s best to select a provider whose customer support is available year-round, including holidays.
- Local Presence: If you prefer in-person communication, opt for a provider with a physical location you can visit.
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5. Introduction to Physical SIM Cards
If your phone doesn’t support eSIM or you prefer not to switch your eSIM, don’t worry! You can always use a SIM card for your travels. Read on to learn how to choose the right physical SIM for your trip!
6. What travelers in Japan need to know about physical SIM cards
Before you buy a SIM card for travel in Japan, here are three important things you need to know:
Where to buy a SIM card in Japan
You might think you can buy a SIM card directly from a major Japanese mobile carrier like docomo, au, or SoftBank. However, this isn’t possible. These carriers provide prepaid SIMs to retailers, and that’s where you can get one. One example of such a retailer is Sakura Mobile, as mentioned in this article.
How to use SIM card and Pocket Wi-Fi in Japan
About prepaid SIM cards with phone numbers
In Japan, prepaid SIM cards sold with a phone number are rare due to legal and security concerns. This means you can only apply for a Japanese phone number here if you have a residence card, which is impossible to obtain on a tourist visa. However, anyone can get a data-only SIM card, which lets you use messenger apps like WhatsApp to make calls.
In Japan, prepaid SIMs with phone numbers for travelers are rare, with only data-only SIMs typically available.
These provide data but no phone number due to strict identity verification laws, which restrict phone numbers to residents. Providing phone numbers to non-residents is generally considered illegal. Some companies may offer eSIMs with Japanese numbers, but they could be operating illegally, and the SIM may not work properly.
Data-only SIMs on the other hand, still allow calls and messaging through apps like Skype and WhatsApp without any of the legal complications.
For those who want to know more about obtaining a phone number in Japan and the related legal aspects, please refer to the article below.
Online Reservation vs. Airport Purchase
How to get a SIM card in Japan?
There are two ways to purchase a SIM card for Japan:
- Reserve one online before your trip and pick it up at the airport upon arrival.
- Buy one from a retailer at the airport after you land.
We recommend reserving your SIM card online for two main reasons:
- It’s cheaper. Online retailers have lower operating costs, so their prices are more affordable.
- You’ll avoid the risk of SIM cards being sold out. During peak travel seasons, airport shops may run out of stock. With a reservation, you can pick up your SIM card stress-free.
All the providers we introduce in this article offer the option to reserve your SIM card online. It’s a convenient choice to make before your trip.
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7. Top SIM Cards for Japan Travel
Scroll right for more →→
Provider | Amount of Data x Days | Prices | English Customer Support | Reviews | Pickup | Network | Connection Speed | |
#1 | Sakura Mobile | Unlimited Data Rental period length: 8 - 90 days | ★★★★☆ 4/5 | ★★★★★ 5/5
| # of reviews: 3,184 Result: Very good |
| docomo 4G/LTE | Few ~ 20 Mbps |
#2 | HIS Mobile | Unlimited Data Rental period length: 8 - 31 days | ★★★★★ 5/5 | ★★☆☆☆ 2/5
| No reviews found |
| docomo 4G/LTE | Unknown |
#3 | Any Fone JAPAN | Unlimited Data Rental period length: 8 - 30 days | ★★☆☆☆ 2/5 | ★★★★★ 5/5
| No reviews found |
| Unknown | Unknown |
#4 | GENKI MOBILE | 1 - 30 GB Rental period length: 1 - 30 days *You can select your rental period | ★★★☆☆ 3/5 | ★★★★☆ 4/5
| # of reviews: 15 Result: Very good |
| docomo 4G/LTE | Unknown |
#5 | b mobile | 5 - 7 GB Rental period length: 10 - 21 days | ★★★☆☆ 3/5 | ★★☆☆☆ 2/5
| # of reviews: 24 Result: Very good *From Facebook |
| docomo 4G/LTE | Unknown |
#6 | eConnect | 500 MB - 10 GB Rental period length: 7 - 60 days | ★★☆☆☆ 2/5 | ★★☆☆☆ 2/5
| # of reviews: 3,620 Result: Very good |
| docomo 4G/LTE | Around 4 Mbps |
#7 | SoftBank Global Rental | 3 - 10 GB Rental period length: 31 - 90 days | ★★☆☆☆ 2/5 | ★★★★★ 5/5
| # of reviews: 8 Result: Average |
| SoftBank 4G/LTE | Unknown |
Japan Prepaid SIM Data: Comparing Limited vs. Unlimited Plans
Which SIM Card Should You Choose?
Feeling more confident about which SIM card might be right for you? Let’s dive deeper into the details of our top three recommended providers.
Sakura Mobile
Scroll right for more if on mobile →→
Website | https://www.sakuramobile.jp/ |
Amount of Data | Unlimited Data Rental period length: 8 - 90 days |
Prices | ★★★★☆ 4/5 |
English Customer Support | ★★★★★ 5/5
|
Reviews | # of reviews: 3,184 Result: Very good |
Pickup |
|
Network | docomo 4G/LTE |
Connection Speed | Few ~ 20 Mbps |
While Sakura Mobile’s SIM cards may not be the cheapest, they offer relatively fast connection speeds (up to 20 Mbps) and unlimited data.
Here are some key benefits of choosing Sakura Mobile:
Extended Airport Counter Hours
Most companies listed above require you to pick up your SIM card at the airport post office, which may be closed if your flight arrives late. However, Sakura Mobile has airport pickup counters with extended hours, ensuring you can get your SIM card without any hassle.
Year-Round English Support
At Sakura Mobile, our English customer support is available year-round, making it easy to get help with your SIM card whenever you need it. You can also reach out to us via email for assistance.
High Customer Satisfaction Rating
Sakura Mobile’s website has over 3,000 positive reviews, significantly more than its competitors.
Main airport pickup counters
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- Narita Airport Terminals 1 and 2: Open daily from 7:00 am until the last flight.
- Haneda Airport: Open 24/7
- Kansai International Airport: Open daily from 7:00 am to 7:00 pm
Sakura Mobile Review | Prepaid SIM & WiFi (Pick Up at Narita & Haneda Airports)
How to pick up your SIM card from the airport counter
Picking up your SIM card from the airport counter is easy. Just bring your reservation confirmation email from Sakura Mobile and your passport. The video below explains how to pick up a Sakura Mobile SIM card at the airport.
Explore Customer Feedback on Sakura Mobile SIMs
While traveling in Japan, we have had customers who experienced frustration and stress while dealing with SIM cards and eSIMs. Although many companies in Japan offer similar telecom services, the same cannot be said for the English support and service that Sakura Mobile provides. Along with utilizing the largest telecom network in Japan, docomo, Sakura Mobile provides full English service from start to finish, helping customers with their orders and any technical issues that may ruin the trip. With support via phone, email, and chat, customers can enjoy their trip to the fullest without any worries and stress.
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8. Key Factors When Choosing a SIM Card
Before introducing the top companies that provide travel SIM cards, here are some key points to consider:
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- Connection speed
- Amount of data
- Coverage
- English support
- Airport counters
-
Let’s dive into each of these in more detail.
① Connection speed
When you’re on a trip and using your phone, you typically browse the web, message, or use Google Maps. For these activities, speeds of 3 to 5 Mbps are usually enough. Here’s a table of the ideal internet speeds for various online activities.
Scroll right for more if on mobile→→
Activity | Required Speed |
4K Video Streaming/Online Gaming | 25 Mbps |
Online Meetings | 10 Mbps |
HD Video Streaming (1080p) | 5 Mbps |
HD Video Streaming (720p) | 3 Mbps |
Web Browsing/Emails/Messaging Apps | 1 Mbps |
You might wonder how fast prepaid SIM cards in Japan can be. While connection speeds vary by provider, you can generally expect speeds between 1 and 20 Mbps. We recommend choosing one with faster speeds for better reliability.
Although some providers claim speeds up to 187 Mbps, the maximum speed you’ll likely experience is around 20 Mbps. The comparison table lists actual speeds for each provider so you know what to expect. Note that some companies do not disclose their SIM card speeds; in these cases, we’ve marked them as “unknown” in the table
② Data Allowance
If you’ve been looking into prepaid SIM cards, you’ll notice many data plans available. With a limited data plan, you might run out of data in the middle of your trip, which can be very inconvenient. Imagine losing access to Google Maps and Google Translate in a foreign country — that would be quite stressful. To travel worry-free, we strongly recommend getting a prepaid SIM card with unlimited data.
Our experts explain the prepaid SIM card with unlimited data in the blog below.
Japan Prepaid SIM Data: Fixed vs. Unlimited Plans
What is a Fair Usage Policy (FUP)?
Ever wondered why your internet speed sometimes slows down, even with an unlimited data plan? The answer lies in a concept called the Fair Usage Policy (FUP).
Think of an FUP as ensuring everyone gets a fair share of the internet. It’s like a traffic cop, making sure the internet highway doesn’t get congested and everyone can keep moving at a reasonable speed.
Even with an unlimited SIM card, the FUP can slow down your connection speeds if you exceed a certain data threshold. To avoid triggering the FUP, consider saving big video downloads, online games, and YouTube binges when using Wi-FI at your hotel.
③ Service Coverage
The SIM card providers we recommend use Japan’s major carrier networks, covering 99% of populated areas. This ensures you’ll have internet access almost everywhere in Japan. However, signals may weaken in mountainous regions or underground.
④ English Language Support
If you’re having trouble connecting to the internet or setting up your SIM card, you’ll want to be able to contact customer support and get help.
Choose a SIM card provider that offers both email and phone support. This way, you can use the phone for urgent issues and email when you don’t need an immediate response.
Many prepaid SIM card providers don’t offer weekend support, which can be a real hassle if you need immediate assistance. Be sure to choose one with year-round customer service to make sure you’re not stuck waiting for the next business day.
⑤ Airport Pickup
To avoid any inconvenience when picking up your SIM card at the airport, ensure your arrival time aligns with the pickup counter’s operating hours. The last thing you want is to find the counter closed when you get there.
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8. eSIM vs. Physical SIM Card vs. Pocket WiFi: Which is Best?
When traveling in Japan, eSIM and SIM cards aren’t your only options for staying connected. Pocket WiFi devices, also known as mobile hotspots or portable WiFi routers, are also popular among travelers.
eSIM | SIM Card | Pocket WiFi | |
Price | Relatively low | Relatively low | Relatively high |
Set Up | Requires changing the device's settings | Requires changing the device's settings | Ready to use out of the box |
Supported Devices | Smartphones and tablets that are unlocked and support eSIM function | Smartphones and tablets that are unlocked | All WiFi-compatible devices |
Battery Life | No charging required | No charging required | Requires regular charging |
Best Use | Solo travelers with one mobile device | Solo travelers with one mobile device | Travelers in a group or travelers with multiple devices |
We recommend buying a pocket WiFi if you want to:
-
-
- Have easy internet access with minimal setup
- Share data with family and friends while traveling
-
Consider purchasing an eSIM or physical SIM card if you:
-
-
- Prefer not to carry a pocket WiFi device
- Prefer not to have to worry about another device’s battery life
- Don’t need to share data with others during your trip
-
Learn About Sakura Mobile’s Pocket WiFi Devices
9. eSIM & Physical SIM card FAQ
eSIM FAQ
Can I Use a Japanese eSIM with My Phone?
To use a Japanese eSIM, your device must:
-
-
- Be eSIM-compatible
- Be SIM-free (not SIM-locked)
- Work with Japanese networks
-
Most providers’ websites have a list of compatible devices for their eSIM. For example, see the list of devices compatible with Sakura Mobile’s eSIM.
If you need help figuring out if your device is SIM-free and compatible with Japanese networks, contact your chosen carrier to confirm. For example, you can use Sakura Mobile’s Contact Form to send your device name and model number, and their staff will confirm compatibility.
Setting up an eSIM varies by device and provider but usually involves scanning a QR code. This code is often emailed or found in the provider’s app. Using the app may require you to register and provide personal details. If you get the QR code by email, you can often skip this step, making the process easier and faster.
Physical SIM FAQ
Can I Use a Japanese eSIM with My Phone?
To use a Japanese SIM card, your device must be:
-
-
- SIM-free (unlocked)
- Able to receive Japanese carriers’ signals
-
Most providers’ websites have a list of compatible devices for their SIM cards. For example, see the list of devices compatible with Sakura Mobile’s SIM cards.
If you need help figuring out if your device is unlocked and can receive Japanese carriers’ signals, contact your chosen carrier to confirm. For example, you can use Sakura Mobile’s Contact Form to send your device name and model number, and their staff will confirm compatibility.
The SIM card setup process varies depending on your device and provider. However, it’s straightforward and can be completed in 10 to 15 minutes by following the manual.
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10. eSIM and physical SIM card or Pocket WiFi
eSIM and physical SIM cards are not the only options for connecting to the internet while traveling in Japan. Pocket WiFi devices, also known as mobile hotspots or portable WiFi routers, are also popular among travelers.
We recommend buying a pocket WiFi if:
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- You want to use the internet with minimal setup
- You want to share data with family and friends who are traveling with you
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On the other hand, you should consider purchasing an eSIM or physical SIM card if:
-
-
- You do not want to carry a pocket WiFi device on your trip
- You are worried about the battery life of another device
- You are not sharing data with other people during your trip
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Sakura Mobile offers pocket WiFi devices in addition to eSIM and physical SIM cards. If you are interested, please check the Sakura Mobile travel pocket WiFi website.
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11. Final Thoughts
This article covered everything you need to know when shopping for mobile internet access for your Japan trip. We hope you found it helpful. Thank you for reading, and good luck!
Why Sakura Mobile is the Best Choice for eSIM & SIM Cards
Learn More About Sakura Mobile eSIMs
Learn More About Sakura Mobile SIM Cards
Key features for Sakura Mobile products
- Unlimited SIM card data plans starting at just 4,500 JPY.
- Access to the stable, fast docomo 4G network.
- Coverage in 99% of populated areas.
- Reliable, year-round English customer support.
- Convenient pickup at any international airport in Japan.
- Order online and pick up your SIM card as early as the next day.
- Free delivery of SIM cards to hotels across Japan.
For your eSIM and SIM card needs in Japan, we recommend Sakura Mobile, which has earned over 3,000 customer reviews and a 4.7/5 satisfaction rating. If you’re getting a SIM card, Sakura Mobile will deliver it free of charge to the airport or the place you’ll be staying.