eSIM in Japan: which plan to choose in 2026?

The best eSIM for Japan, compared for you: price, data, coverage and activation.

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See the plans Updated in août 2026 • 35 plans available

Compare eSIM plans for Japan: data, duration, prices and operators. Find the best offer and activate it now.

What are the best eSIM plans in Japan?

Each provider's best plan for this country, with the real price.

Provider	Data	Duration	Price	Price/GB
Saily ★ 4.7 · Review	Unlimited	7 days	$11.03	—	View →
Ubigi ★ 4.4 · Review	20 GB	30 days	$59.17	$2.96	View →
Holafly ★ 4.6 · Review	Unlimited	5 days	$19.05	—	View →
YesSim ★ 4.3 · Review	Unlimited	7 days	$13.04	—	View →
DrimSim ★ 4.1 · Review	5 GB	30 days	$15.70	$3.14	View →
Airalo ★ 3.9 · Review	Unlimited	10 days	$35.10	—	View →

Cheap eSIMs in Japan

A comparison of the cheapest plans, all providers combined.

Provider	Data	Duration	Price	Price/GB
Airalo	1 GB	7 days	$4.01	$4.01
DrimSim	1 GB	7 days	$4.98	$4.98
Saily	1 GB	7 days	$5.01	$5.01
Airalo	2 GB	15 days	$6.52	$3.26
Ubigi	500 MB	30 days	$7.02	$14.04
Airalo	3 GB	30 days	$8.02	$2.67

Guide expert

Finding the best Japan eSIM plan is not just about choosing the lowest price: you also need to understand the network used, the plan’s actual validity period and your data needs. This guide helps you buy, install and use your eSIM in Japan with the right settings, whether you are spending a week in Tokyo or a month travelling from Hokkaido to Okinawa.

How does an eSIM work in Japan, and is my phone compatible?

An eSIM is a digital SIM card already built into your phone: instead of inserting a plastic chip, you download a carrier profile that provides access to a Japanese mobile network. After your purchase, the provider will usually send you a QR code, an installation link or activation through its app. You can therefore buy and install your plan before departure, while safely connected to your home or departure hotel’s Wi-Fi.

In practice, a travel eSIM for Japan most often includes mobile data only. It connects to a local partner operator, such as NTT Docomo, KDDI through its au brand, SoftBank or Rakuten Mobile, depending on the plan selected. Your phone then uses this line for Internet access, while your French SIM can remain in the device so you keep your usual number.

The main difference from a physical SIM is one of simplicity and flexibility. There is no need to remove your French card, visit a shop or risk losing the tiny original chip on the plane. A single smartphone can store several eSIM profiles, although it can generally use only a limited number of lines simultaneously. However, an eSIM is not a universal guarantee of compatibility: your device must be compatible, unlocked and authorised to use an eSIM in the region where it was sold.

iPhone: models from the iPhone XR, XS and XS Max generally support eSIM; recent iPhones sold outside certain markets may support two active eSIMs.
Samsung Galaxy: the Galaxy S, Z Fold and Z Flip series, as well as many recent A and Note models, are compatible, but check the exact model in your settings.
Google Pixel: recent Pixel phones, particularly from the Pixel 3 onwards in many versions, support eSIM; imported versions may differ.
Other compatible devices are available from Xiaomi, Oppo, Huawei, Motorola and certain cellular iPads, but eSIM availability often depends on the country where the device is sold.
Your phone must be unlocked: a device locked to an operator may not be able to accept a travel profile. Check with your operator if you are unsure.
On iPhone, go to Settings > Cellular and look for “Add eSIM”. On Android, look for “SIM”, “Mobile network” or “SIM manager” in Settings; the **\*#06#** code may also display an EID, an identifier associated with the eSIM.

Which eSIM should you choose for good 4G or 5G coverage in Japan?

The best eSIM for coverage in Japan is the one that uses a strong local network along your itinerary, not necessarily the one offering the largest amount of data. NTT Docomo, KDDI/au and SoftBank all have extensive coverage in populated areas; Rakuten Mobile is also available, but its performance may depend more on the area and roaming agreements. Before buying, always check which network the provider mentions, or whether the plan switches between several networks.

In Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Fukuoka or Sapporo, a good eSIM will normally provide fast 4G and, depending on the plan and phone, 5G in many districts. For everyday uses—Google Maps, bookings, translation, social media and occasional video calls—Japanese 4G is already more than sufficient. 5G mainly improves the experience in stations, very busy areas and when transferring files, but it should not be your only selection criterion.

Japan is very well connected, although coverage is not uniform. In railway tunnels, the basements of some buildings, mountain valleys and remote islands, reception may weaken regardless of the provider. A trip to Kamikochi, the Japanese Alps, Mount Koya, the volcanic areas of Kyushu or parts of Hokkaido requires more caution than a city break. Download your maps and tickets for offline use before leaving a well-covered area.

Actual speeds vary depending on the time, device, partner network and network congestion. In a large city, browsing and video can be very smooth; at a station during rush hour, congestion may temporarily slow the connection. Also be wary of certain plans described as unlimited: they may apply a fair-use policy, reduce speeds after a daily threshold or restrict tethering.

Major cities and central districtsVery reliable 4G and 5G often available in Tokyo, Osaka, Kyoto, Nagoya, Fukuoka and Sapporo.

Shinkansen lines, airports and major tourist attractionsConnection is generally smooth, with possible slowdowns in stations and during busy periods.

Main roads, small towns and inhabited rural areas4G is usually adequate, but the partner network and terrain make a real difference.

Mountains, tunnels, isolated valleys and remote islandsThe signal may be weak or unavailable; prepare maps and essential information for offline use.

Prioritise an offer that clearly specifies Docomo, KDDI/au or SoftBank if you are leaving the major cities.
Do not pay a significant premium solely for 5G: stable 4G is often more useful than theoretical 5G.
Check the local operator’s coverage map if your itinerary includes hiking, skiing, camping or small islands.
Download Google Maps, Japan Travel by NAVITIME maps and your bookings before travelling through the mountains or by train.
If your itinerary is very rural, choose a provider with responsive support and a simple top-up process.

Should you choose a Japan eSIM or a regional Asia plan?

For a trip exclusively in Japan, a national Japan eSIM is almost always the simplest and most affordable choice. It is designed to connect to Japanese networks and generally offers more data for your budget than a plan covering an entire continent. It is the logical option for a Tokyo–Kyoto–Osaka itinerary, a stay in Okinawa or a road trip through Hokkaido.

A regional Asia eSIM becomes worthwhile if Japan is only one stop on your journey. This is particularly true for an itinerary including South Korea, Taiwan, Hong Kong, Singapore, Thailand, Vietnam or the Philippines. You avoid reinstalling a profile at every border and stay connected as soon as you land at your next destination. However, check the country list carefully: “Asia” does not always cover the same destinations with every provider.

You should also distinguish between regional coverage and network quality. A multi-country plan may use a different network from the seller’s Japan plan, offer less data, be limited to 4G or cost more per gigabyte. For a two-day stopover in Seoul before fifteen days in Japan, compare the actual additional cost of a regional plan with buying two separate eSIMs.

Choose a Japan eSIM if you are staying in the country: it is usually better sized for your needs and more cost-effective.
Choose an Asia-Pacific eSIM if you are crossing several borders during the same trip.
Check that every transit country is included, including a possible extended stopover in Seoul, Taipei or Hong Kong.
Check roaming and top-up rules: some regional plans do not allow you to add data in every country.

What do traveller reviews reveal about eSIMs for Japan?

Travellers particularly appreciate instant connectivity after leaving the plane, not having to queue at a counter and being able to keep their French SIM card. On a first trip to Japan, being able to open Google Maps, book a train, translate a sign or contact your hotel without searching for Wi-Fi is a considerable convenience. Well-designed provider apps that display remaining usage and allow top-ups are also often mentioned as a real advantage.

Less enthusiastic reviews rarely concern the eSIM itself, but rather details overlooked before purchase: validity starting too early, a plan advertised as unlimited but with reduced speeds, hotspot restrictions or an unspecified partner network. Some problems also result from installing the eSIM after landing without reliable Wi-Fi, or from selecting the wrong data line in the phone settings.

The lesson is simple: do not choose based solely on the word “unlimited” or an attractive price. Read the terms covering tethering, reduced speeds, top-ups and support. A provider that is slightly more expensive but offers a clear guide and support available during Japanese business hours may save you from spending an evening of your trip solving a configuration problem.

Recurring advantages: installation in advance, Internet available immediately upon arrival, keeping your personal number.
Be careful with unlimited plans: look for reduced-speed policies, daily caps and hotspot restrictions.
Check the partner network: the experience may vary between a Docomo, au/KDDI, SoftBank or multi-network plan.
Keep the QR code and order details accessible offline in case you need to reinstall the profile or contact support.

How do you buy, install and activate your eSIM for Japan?

The best approach is to install your eSIM before your flight, but activate its data only at the time specified in your plan’s terms.

1
Check compatibility
First check that your phone supports an eSIM and is unlocked. Also make sure you have a stable Wi-Fi connection, enough battery and an available eSIM slot; delete an old unused travel profile if your phone has reached its storage limit.
2
Buy and receive the QR code before departure
Buy your plan a few days before departure so you have time to read the terms and receive the QR code. Do not scan the same code on two devices: a profile is generally single-use. Take a screenshot of the QR code and keep the confirmation email in your offline files.
3
Install the profile on iPhone or Android
On iPhone, open Settings > Cellular > Add eSIM > Use QR Code, then scan the code. On Android, the path varies by brand but usually goes through Settings > Connections or Network & Internet > SIM manager / SIM > Add eSIM. Give the line a clear name, such as “Japan data”, so you do not confuse it with your French line.
4
Activate on arrival and configure the APN
When you arrive, activate the eSIM line, select it as your mobile data line and enable data roaming on this eSIM if the provider requires it; here, this refers to technical roaming through its partner network, not your French plan. The APN is often installed automatically. If Internet access does not start, enter the supplied APN exactly, without adding spaces or changing the other fields.
5
Troubleshoot if Internet access does not start
Turn airplane mode off and on, restart the phone and check that mobile data is assigned to the Japan line. Disable cellular data on your French SIM to avoid accidental charges, then check the eSIM’s APN and roaming settings. If the problem continues, contact support with a screenshot of your settings and your precise location.

Can I keep my number, make calls, share my connection and top up in Japan?

Yes, you can generally keep your French number while using a Japanese eSIM for Internet access through dual SIM mode. The travel eSIM becomes your data line, while your usual SIM handles calls and SMS. However, making or receiving calls on your French number may trigger roaming charges depending on your operator: disable mobile data on that line and check its rates before departure.

Most travel eSIMs are data-only: they do not include a Japanese number, traditional calls or local SMS. This is not a problem for WhatsApp, Signal, FaceTime, Telegram, Messenger or calls through LINE, which is widely used in Japan: these services use the Internet and your account will usually retain your French number. For some bookings, a hotel may request a telephone number; provide your usual number with the international prefix or contact the property by email.

Hotspot allows you to connect a computer, tablet or travel companion’s phone to your eSIM when the provider permits it. On iPhone, go to Settings > Personal Hotspot; on Android, look for Wi-Fi hotspot under Network & Internet or Connections. This feature uses data quickly: a video conference, computer updates and video streaming can consume several gigabytes in a short time.

When your allowance runs out, avoid waiting until you are lost in an area without Wi-Fi. Open the provider’s app or website to purchase a top-up, if your plan offers one. Otherwise, you will need to install a new plan. Always keep a backup solution: offline maps, hotel Wi-Fi and screenshots of addresses in Japanese.

Set the Japan eSIM as your default mobile data line and disable automatic data switching to your French SIM.
WhatsApp and other messaging apps keep your account: do not change your number in the app simply because you are using an eSIM.
For urgent calls to relatives, use Wi-Fi Calling if your French operator supports it and you have checked the terms before travelling.
Explicitly check that hotspot use is included: some unlimited plans prohibit or restrict it.
Monitor usage in your phone settings and in the provider’s app, especially if you share your data.

How much data should you plan for, and what mistakes should you avoid when choosing your Japan eSIM?

For light usage, you will often need 1 to 3 GB per week; for intensive browsing, social media and video, plan for around 5 to 10 GB per week, or more if you share your connection.

Do not confuse trip duration with plan validity. A 7-day plan may end at a precise time on the eighth day, depending on how the provider calculates validity; for an eight- or nine-night stay, choose a comfortable margin.
Identify what triggers validity. Some plans start at installation, others at the first connection to the Japanese network, and others on a selected date. Install early only if the terms specify that the plan starts on arrival.
Adapt the allowance to your actual habits. Google Maps, translation, train schedules and messaging use little data; stories, automatic photo backups, TikTok, YouTube and video calls are the real data-hungry activities.
Disable automatic updates, cloud synchronisation over mobile data and high-definition video playback. Enable downloads over Wi-Fi in Google Photos, iCloud Photos, Spotify, Netflix and app stores.
Choose the right type of plan. An unlimited plan suits a content creator or remote worker, but a fixed-data plan is often much more economical for checking maps and booking restaurants.
Read the small print on speeds. “Unlimited” may mean data without a cap but with a reduction after a certain daily usage or during intensive use; look for mentions of fair use, restrictions or reduced speeds.
Do not delete your eSIM too quickly. Once removed, a profile often cannot be reinstalled with the same QR code. Wait until the end of your trip and check that you no longer need a top-up before deleting it.
Prepare basic digital security. Use a reliable VPN on public Wi-Fi, avoid banking transactions on unknown networks and protect your phone with a passcode, biometrics and remote location tracking.
Download the essentials in advance: offline maps, the hotel address written in Japanese, tickets, bookings, train apps and a copy of your insurance. An eSIM greatly improves your trip, but it does not replace a backup plan.

Questions fréquentes

Will my eSIM work as soon as I arrive at Narita, Haneda or Kansai?

Yes, in most cases, provided the profile has already been installed and you activate the line as mobile data when you land. Turn off airplane mode, enable eSIM roaming if requested and wait a few minutes for registration on the network.

When exactly does my Japan eSIM plan validity begin?

It depends on the provider: validity starts either at installation, at the first connection to a Japanese network or on a scheduled date. Check this before scanning the QR code, as premature activation may use up days of validity.

Can I call Japanese emergency services with a data-only eSIM?

Do not rely on a data-only eSIM for conventional emergency calls. In Japan, dial 110 for the police and 119 for an ambulance or fire service from a line capable of making calls; ask staff at a station, hotel or shop for help if necessary.

Can I use the same Japan eSIM on two phones?

No, an eSIM purchased for one device generally cannot be shared or activated on two devices at the same time. For a couple or family, get one eSIM per phone, or use the hotspot occasionally if this feature is authorised.

Can I get a refund if the eSIM does not work?

Policies vary considerably: a profile that has already been installed or activated is often non-refundable, as it is considered used. Before buying, read the cancellation policy, keep screenshots of your settings and contact support quickly before deleting the profile.