Japan eSIM Guide 2026: SIM, eSIM & Pocket WiFi Prices
Compare Japan eSIM, physical SIM and pocket WiFi plans, including Airalo and Japan Experience, with setup steps, airport pickup and key restrictions.
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Comparing the Three Options
There are three ways to get online in Japan: an eSIM, a physical SIM or pocket WiFi. The right choice depends on your device, the number of people traveling and the length of your stay.
| eSIM | Physical SIM | Pocket WiFi | |
|---|---|---|---|
| Prices and plans | Compare providers | Examples by data allowance and duration | Major rental services |
| Purchase and delivery | Receive setup information online | Airport shops, delivery and other options | Airport pickup, delivery and other options |
| Setup | Add the eSIM using the seller’s instructions | Insert the card and configure the connection | Connect to the router over WiFi |
| Multiple devices | Tethering if supported by the product and phone | Tethering if supported by the product and phone | Share up to the router’s device limit |
| Phone number | Distinguish data-only plans from voice plans | Distinguish data-only plans from voice plans | Does not provide a phone number for your smartphone |
| Charging | Charge your phone | Charge your phone | Charge both your phone and the router |
| Returns | No card or router to return | Follow the seller’s instructions | Return to a designated location or by mail |
If you only need a connection for your own phone, an eSIM is convenient because there is no card to collect or swap. If your phone does not support eSIM, consider a physical SIM. To share a connection with family or several devices, compare pocket WiFi too. Anyone who splits off from the group will need a connection of their own. Group size alone does not tell you which option is cheapest.
Tethering shares your phone’s mobile data connection with other devices. With a compatible SIM, it can connect a laptop or another device without renting a router.
Recommended eSIM Providers
Choose a data-only plan for maps and web browsing, or a voice-enabled plan if you need a Japanese phone number. Narrow the options by how you will use the service, then compare data allowances and validity periods.
eSIM Comparison for Travelers
These options include physical SIMs and pocket WiFi as well as eSIMs.
| Provider or product | Suits travelers who want to… | Example prices and plans | Pickup or setup details |
|---|---|---|---|
| Airalo | Choose between fixed-data and unlimited plans | Japan plan prices and durations | See the setup instructions for your plan |
| Holafly | Choose the number of days for an unlimited plan | Example: 7 days for US$27.50. Temporary FUP throttling may apply | Tethering limited to 1 GB per day |
| Mobal Voice-Only eSIM | Make calls and use SMS with a Japanese number | ¥4,950 upfront + ¥1,430 per month, tax included. No mobile data | Identity verification and receipt of a physical access code required |
| Ninja WiFi K4 Infinite Unlimited (pocket WiFi) | Share a connection with companions or several devices | ¥1,980 per day, tax included. Speeds may drop after heavy use | Airport or Shinjuku counter pickup, or delivery |
| IIJmio Japan Travel SIM | Choose between a physical SIM and an eSIM | 3–55 GB for 30 days. Prices depend on the retailer | NTT docomo network; setup depends on the SIM type |
Mobal’s Voice-Only product is for calls and SMS, so you need a separate data connection for maps and other apps. See when you need a phone number for its billing and delivery conditions.
Fixed Data Plans
These plans suit travelers who want to choose a data allowance in advance. The price example below is in USD.
Your data needs depend on video streaming, photo backups and tethering. On an iPhone, app-by-app usage under Settings → Cellular provides a useful starting point. Allow for any extra use during your trip and choose a plan that covers your stay.
Unlimited Plans
“Unlimited” plans can still have speed restrictions and tethering limits that differ by product. FUP stands for fair use policy: conditions that may restrict heavy data use, for example.
If you will share data with a laptop, compare tethering conditions as well as the data available on your phone itself.
Network Differences
eSIM providers use different Japanese mobile networks. Check the official coverage maps for NTT docomo, SoftBank and au (KDDI) for your accommodation and destinations. If you are heading to places such as Ome (青梅) or Okutama (奥多摩), check the route as well as the area around the station.
How to Set Up an eSIM
Installing an eSIM and starting its validity period are separate things to check. Apple also advises following the provider’s instructions. Even if you can install the eSIM before departure, activate the plan at the time specified by the seller. Save your setup information and support page so you can access them without a connection.
iPhone
- At the time specified by the seller, go to Settings → Cellular → Add eSIM. Use the seller’s method, whether that is a QR code, an app or manual entry.
- After arriving in Japan, select the travel line under Cellular Data.
- Follow the seller’s instructions for roaming and APN settings, which specify how to connect to the network. Some products, such as IIJ’s, require APN configuration.
- Turn off WiFi and open a map or web page to check that mobile data works.
If the QR code arrives on the same iPhone, iOS 17.4 and later let you touch and hold a QR code displayed in the default Mail app or a browser to add the eSIM. On an English-language iPhone, the menu is Settings → Cellular / Mobile Data → Add eSIM.
Android
On a Google Pixel, start under Settings → Network & internet → SIMs. Menu names and steps vary by model, so follow your manufacturer’s and seller’s instructions, then select the travel line for mobile data when you arrive in Japan.
For example, Saily’s official instructions say to install its app and eSIM while you have internet access before departure, and turn on data roaming for the Saily line. The plan starts automatically once it can connect in Japan, but it also starts automatically 180 days after purchase even if unused.
Checking Device Compatibility
Check your phone in this order:
- Identify its model and the country or region where it was bought. For iPhone, consult Apple’s eSIM guidance. For Android, compare the manufacturer’s specifications with the seller’s requirements.
- Check the carrier lock. This can prevent you from using another provider’s SIM. On an iPhone, look for the unlocked status under Settings → General → About.
- Check your model against the seller’s compatibility requirements. Finding the EID alone is not enough: also check the product’s requirements for models, frequency bands and other specifications. For iPhones sold in mainland China, use the conditions for the specific model and sales region.
On an English-language iPhone, “No SIM restrictions” under Settings → General → About → Carrier Lock means the phone is unlocked.
Using Your Home SIM Alongside It (Dual SIM)
Compatible iPhones support dual SIM with two lines. Whether your original number can make calls or use SMS in Japan, and what you will be charged, depends on your home carrier. If you expect to receive verification codes, check your carrier’s terms before departure.
To use only the travel line for data, distinguish these two settings:
| Setting | What to select |
|---|---|
| Cellular Data | Select the travel line and turn off “Allow Cellular Data Switching” |
| Data roaming on your home line | Off. Set roaming on the travel line as instructed by its provider |
Apple’s illustrated dual-SIM guide in English shows how to choose the data line under Cellular Data and control automatic switching under Allow Cellular Data Switching. The roaming setting is called Data Roaming. Keeping your home line active for calls and SMS does not make those services free.
Emergency Calls
A data-only subscription does not provide voice calls to 110 or 119. Whether the phone itself can make an emergency call depends on other voice lines and the device’s capabilities. Do not assume that roaming on your home SIM will work. In an emergency, ask someone nearby or a member of staff to call for you. If you need to find medical care, see how to find an English-speaking doctor in Tokyo.
Buying a Physical SIM at the Airport
If your phone does not support eSIM, a physical SIM from an airport shop or arranged for delivery is another option. Distinguish products ordered in advance for airport collection from those sold on the spot.
Narita Airport
The official SIM and communications directory lists shops and opening hours by terminal. Choose a shop you can reach in your arrival terminal.
Haneda Airport
Mobile Center on the second floor of the Terminal 3 arrivals lobby sells SIM cards and lists opening hours of 6:00–23:00. If you land at another terminal or outside those hours, do not plan on buying a SIM at this shop.
Buying a SIM late at night is not guaranteed. If the shops are closed when you arrive, Haneda’s “HANEDA-FREE-WIFI” or Narita’s “FreeWiFi-NARITA” may help. Once connected, you can open the setup instructions or support page for a product you have already bought. Save your accommodation address and travel route before departure too.
Major Physical SIM Brands
Device compatibility comes first with physical SIMs too. Before buying, compare your phone with b-mobile’s carrier-lock and frequency-band requirements or Japan Experience’s model-specific restrictions.
For b-mobile airport post office collection, you must show your passport during counter opening hours. Top-ups add 1 GB and one day for ¥500, tax included. After use, b-mobile asks you to return the card, but there is no extra charge if you do not.
Japan Experience’s physical SIM has speed restrictions based on heavy use over a short period or total usage. It is data-only, with no voice calls or SMS, and supports tethering. Its instructions say that Google Pixel phones are not supported, and first activation is unavailable from Tuesday 22:00 to Wednesday 09:00 Japan time. If that affects your phone or arrival time, compare another product. Check the plan’s instructions for when its validity period starts and ends.
If you buy in town, pay attention to the product type. At FamilyMart, IIJ Japan Travel SIM is an eSIM code purchased from the store’s multifunction copier. It is not a physical card. The instructions require a compatible device, an internet connection such as WiFi, and an email address for setup.
When Pocket WiFi Makes Sense
Pocket WiFi, or a mobile router, is a small device that connects several devices at once. It is an option for these situations:
- A family or group traveling together — You can share one router. If you will often split up, compare individual SIMs too.
- Connecting more than phones — It can connect WiFi-enabled tablets, laptops and other devices. The number of connections depends on the router.
- Using a lot of data — Japan Wireless advertises The ONE as unlimited with no FUP. Those conditions do not apply to every product.
Major Rental Services
Japan Experience says that using more than 3 GB in a day, among other conditions, may temporarily reduce speeds. A supplier change is scheduled for November 1, 2026, and return conditions may also change. Check the return address and deadline in the instructions for your plan.
Downsides of Pocket WiFi
You need to charge and carry a router as well as your phone. If anyone will separate from the person carrying it, arrange another connection for them. Speeds can be affected by network congestion, so the maximum device count does not tell you how fast each connection will be. Optional protection fees and charges for loss or late return also matter when choosing a rental.
On WiFiBOX’s 500 MB per day plan, exceeding 500 MB that day reduces the maximum speed to 128 kbps until the allowance resets at midnight Japan time. With a daily cap, consider days when you will use lots of video or other data, not just your total usage for the trip.
WiFiBOX’s payment guide, for example, lists Visa, Mastercard, JCB, Apple Pay, Google Pay and PayPay. Prepaid cards are not accepted, and cards issued outside Japan are subject to its payment conditions.
When You Need a Phone Number
Choose separately between a data-only plan and one that can make and receive calls with a Japanese number. For example, PayPay registration requires a smartphone that can receive SMS at a Japanese mobile number. When contacting a restaurant or workshop, distinguish cases where email is enough from those that require calls or SMS.
One option for a Japanese number is the Mobal Voice-Only eSIM. It is for calls and SMS; mobile data is not included. It costs ¥4,950 upfront plus ¥1,430 per month, tax included, with separate charges for outgoing calls and sending SMS. Identity verification and a physical access code are required; choose postal delivery or in-person collection. This is not a product you can start using instantly through email alone. Arrange data separately for maps and other apps. Also account for prorated billing in the first month, monthly charges after that, and cancellation through MyAccount.
With LINE, distinguish phone-number verification when creating a new account from using the app with an existing account. Saily’s optional phone-number service provides a US number, so it is not a substitute for services that require a Japanese number.
Troubleshooting
| Problem | What to try first |
|---|---|
| Cannot add the eSIM | Check the saved compatibility information, QR code and installation timing. On iPhone, check requirements such as an internet connection and an active plan |
| eSIM added, but no data connection | Try turning the configured line off and on, toggling airplane mode, then restarting |
| Connection becomes slow during the trip | Check remaining data, plan validity and speed restrictions. Some products, such as Ubigi’s, reduce speeds based on usage |
If that does not help, connect to available WiFi and open the support page you saved. Have your device details and any error message ready, along with your order number, so you can explain the problem. Check the seller’s instructions before deleting an APN or eSIM yourself.
For Saily, go to Help → Chat with us in the app for 24-hour chat support. A chatbot responds first, with a handover to a support agent if the issue is not resolved. You can say, “My eSIM is installed, but I can’t connect in Japan,” and include your phone model and a screenshot of the error.
In case you cannot connect to airport WiFi either, save your starting station, train line, transfer station, destination station, exit and accommodation address as screenshots or on paper before departure. To ask for directions, show the address with: “My mobile internet isn’t working. Could you help me get to this hotel?”
Using Free WiFi as a Backup
The Tokyo Metropolitan Government’s TOKYO FREE Wi-Fi is available at locations shown on its official map; it is not continuous coverage across the city. OpenRoaming registration involves authentication through services such as Google, Apple or LINE, followed by device setup.
Convenience-store WiFi is not the same at every branch. FamilyMart’s former “Famima_Wi-Fi” service has ended, and d Wi-Fi has participating-store and eligibility conditions. Treat it separately from the connection you will use while moving around.
You can also save Google Maps offline maps before departure. However, public transit, walking and cycling directions are not available offline. Save your accommodation address, arrival route and pickup location too, so you can refer to them while setting up your connection.
Frequently Asked Questions
What is the best way to get online during a trip to Japan?
For your own phone, compare an eSIM and a physical SIM after checking compatibility. For several devices used together, compare tethering and pocket WiFi. If members of your group will split up, arrange individual connections too. Group size alone does not determine the cheapest option.
How can I check whether my phone supports eSIM?
Check your exact model and the region where it was sold against the manufacturer’s and seller’s compatibility information. Seeing an EID does not guarantee that a particular product will work. Also check the carrier lock and required frequency bands. Do not assume that every iPhone sold in mainland China is incompatible.
Do unlimited plans have no speed restrictions?
It depends on the product. Holafly, Ubigi and Japan Experience have speed restrictions based on usage or other conditions. Japan Wireless, meanwhile, advertises its The ONE plan as having no FUP. Some products have different limits for regular data use and tethering, so check the terms of the plan you choose.
Can a data-only eSIM make emergency calls to 110 or 119?
A data-only subscription does not provide voice calling. What the phone itself can do also depends on any other voice line and the device’s capabilities. Do not assume that roaming on your home SIM will let you call. In an emergency, ask someone nearby or a member of staff to make the call for you.
How much data do I need for a week in Tokyo?
The number of days alone is not enough to tell: video, photo backups and tethering all affect usage. Use your phone’s normal data consumption as a starting point and allow for anything you will do more often while traveling. Check that the plan lasts until you leave, as well as having enough data.
Can I use my home SIM while using a Japan eSIM?
Compatible phones support dual SIM, but whether you can use your original number for calls and SMS in Japan, and what it costs, depends on your carrier. Select the travel line for mobile data, and check the home line’s data roaming and automatic switching settings.
Where can I buy a physical SIM at the airport?
Use Narita Airport’s official SIM and communications directory or the listing for Mobile Center in Haneda Airport Terminal 3 to find a shop. Check your arrival terminal, opening hours and the products sold there. A SIM may not be available to buy late at night.
Summary: Choose for Your Phone and Your Trip
A compatible data-only eSIM lets you get online without swapping a card or returning a router. If your phone does not support eSIM, consider a physical SIM. Pocket WiFi is another option for a family traveling together or for sharing across devices. As well as data and validity, factor in activation conditions for an eSIM, pickup for a physical SIM and returns for pocket WiFi.
Related Articles
- How to Buy and Use a Suica Card — Buying, topping up and using Suica
- Tokyo Payment Methods Guide — Choosing between PayPay, Suica and cash
- Tokyo Travel Pitfalls — What to prepare beyond your internet connection
Sources
See the official links in each table for product conditions, Apple’s eSIM guide and Google Pixel’s SIM setup instructions for device settings, and Japan Experience’s Terms of Sale for its general sales conditions.
* This article was translated from the original Japanese with the help of machine translation. Some expressions may not read naturally.
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