When travelling to Japan, staying connected is essential for smooth navigation and communication. One of the most efficient ways to ensure uninterrupted mobile data is by using an eSIM, a digital alternative to physical SIM cards that provides hassle-free connectivity. In this article, we’ll explore why eSIMs are a great choice for international travellers, especially those visiting Japan.
We’ll break down the benefits of eSIMs, compare them with traditional SIM cards, and highlight the top ten eSIM providers, with a comparison table so you can see them side by side, to help you make the best choice for your Japan adventure.
Some placements in this guide are commercially supported. Product details are verified with providers before publication.
Choosing the right eSIM for Japan travel
What is a Travel eSIM?
A travel eSIM, or electronic SIM card, is a digital SIM that allows you to activate a cellular plan without needing a physical SIM card. It’s particularly useful for international travellers because it eliminates the need to swap physical SIM cards when moving between countries or regions.
There are many benefits to using an eSIM for international travel, such as easy activation, flexible network switching, cheap & flexible data plans, and instant overseas connectivity.
Most travellers get eSIMs for their convenience, flexibility, cost-effectiveness, and reliability.
Tip: Make sure your phone is also unlocked
…Or your eSIM likely won’t work. Some providers, like T-Mobile USA, allow temporary unlocks for 30 days, while iPhones require a permanent unlock via customer service. One common recommendation is to install the eSIM app and set it up before departure, but not too far in advance to avoid any activation window issues.
Overall, travel eSIMs simplify the process of getting and staying connected to the internet while you’re abroad. If you’re planning to visit Japan, purchasing an eSIM will be a breeze.
eSIM vs Physical SIM
When comparing eSIMs and physical SIM cards in Japan, the choice is clear: eSIMs offer unmatched convenience.
Why bother with a physical SIM when you can pre-purchase and activate an eSIM remotely? Instead of navigating language barriers in mobile shops, simply download an eSIM before your trip and activate it upon arrival.
eSIMs allow network switching and are more eco-friendly than physical cards. The eSIM vs. physical SIM debate is over: eSIMs offer travellers an easy, sustainable, and hassle-free experience.
Without further ado, here are our top 10 eSIMs you should consider when planning a trip to Japan.
The Top 10 Best eSIMs in Japan
1. Nomad eSIM
Nomad eSIM Japan plans (nomadesim.com)
Nomad eSIM: best for flexible plan choice and hotspot sharing
Nomad eSIM sells travel data plans through its app for more than 200 destinations, and its Japan range is one of the broadest in this guide. In Japan the eSIM connects through KDDI au or SoftBank, depending on the plan you choose, with 4G or 5G speeds depending on the plan, your location and the network. Most plans start counting down when the eSIM first connects to a supported network in Japan, so you can install it at home and forget about it until you land.
Fixed data plans run from 1GB up to 50GB, and there are unlimited plans for 3, 7, 14 and 21 days. Prices start from US$4, roughly £3 at the time of writing, for the smallest plan. Hotspot and tethering are supported, which matters if you want to share data with a travel companion or a laptop, and add-ons are available on eligible plans through the app if you need more data mid-trip.
Which plan fits your trip:
- Maps, messaging and train apps only: a low data plan covers it, and the 1GB plan is enough for a short city break if you lean on hotel wifi.
- A typical one to three week trip: 10GB or 20GB is the practical middle ground for photos, social media and the odd video call.
- Heavy data use or remote work: choose an unlimited plan or the 50GB option.
- Japan plus other stops in Asia: Nomad eSIM’s regional plans (APAC, a China, Japan and Korea plan, and selected global plans) keep one eSIM running across borders.
Eligible new users can try 1GB free for three days with no card needed, which is a low risk way to check your phone works with the eSIM before you buy. Support is available 24/7 by live chat and email.
See current Nomad eSIM plans for Japan
2. Revolut
eSIM: What is an eSIM and how do I get one? | Revolut United Kingdom
Revolut, a global neobank and fintech company based in London, UK, is renowned for offering tailored financial services worldwide. Recently, they’ve expanded into eSIM technology, ideal for travellers looking for flexible and affordable connectivity options.
Revolut offers flexible eSIM plans starting at just £1 for 1GB of data, available across more than 100 countries, including Japan. To use this service, you must be a Revolut app user and account holder.
The app makes it easy to select a plan by country from their extensive global list, and you can top up your data whenever needed.
Revolut’s eSIM is compatible with a broad range of devices, offering convenient global connectivity. Users can quickly activate their eSIM by following simple steps within the Revolut app, ensuring they have access to data as soon as they arrive at their destination.
3. Japan Wireless
Established in 2015 by travel company Inbound Platform Corp, Japan Wireless has become well-known for offering multiple connectivity solutions in Japan, including pocket WiFi rentals, prepaid SIM cards, and more recently, eSIMs. Traditionally recognised for their portable WiFi services, Japan Wireless has launched eSIM services to cater to the growing demand for digital connectivity.
Their eSIM provides nationwide coverage and quick activation, but they still specialise more in physical SIMs and portable WiFi options, which require pickup and return, making them less convenient than eSIMs.
4. Ubigi eSIM
Ubigi eSIM: travel and local data plans for mobile devices
Ubigi is a leading provider in the eSIM market, offering extensive global cellular connectivity across more than 200 destinations, including Japan. The Ubigi eSIM stands out with flexible data plans that cater to various devices, from smartphones to laptops, and even connected cars. With Ubigi, you can get a 1-day 500MB plan for £2, or go for a larger 50GB monthly data plan at £48. Notably, Ubigi offers fast, reliable speeds, averaging 73Mbps, ensuring high-quality connectivity at affordable rates for travellers worldwide.
Ubigi’s eSIM services are ideal for global travellers, especially those heading to Japan. The Ubigi eSIM Japan offers reliable, high-speed data with flexible plans tailored to your travel needs. Whether you’re staying for a day or a month, Ubigi’s eSIM data plans allow you to stay connected at competitive rates.
Their eSIM plans are easy to set up and activate, offering instant service from the moment you land. Travellers can purchase a Ubigi eSIM online, avoiding the need to pick up a physical SIM card.
5. Jetpac
9 Best eSIM in Australia for Travelers (travlists.com)
When selecting an eSIM for your Japan trip, prioritise one that offers fast 5G speeds, broad coverage, and affordability. Jetpac, a Singapore-based company, stands out with its travel-friendly data roaming services. They offer various data-only plans tailored for Japan, from 1GB to 40GB, covering durations of 4, 7, or 30 days.
Starting as low as £0.80, Jetpac guarantees high-speed, reliable data throughout Japan, operating on the trusted KDDI 5G network. Additionally, Jetpac eSIMs come with perks like free airport lounge access for delayed flights, making your journey even smoother.
When choosing an eSIM for your Japan trip, Jetpac stands out with its new JetFlex and JetPro plans, offering flexibility and premium perks. With JetFlex, you can top up data anytime and use it across 150+ destinations, ensuring no more bill shocks.
For frequent travellers, JetPro adds benefits like free airport lounge access for delayed flights and 24/7 premium customer support.
Once Jetpac’s eSIM is installed, it works forever, eliminating the need to switch SIM cards. With fast 5G speeds, wide coverage, and affordable pricing, Jetpac ensures you stay connected effortlessly during your trip.
6. Saily
If staying connected in Japan with zero hassle is a priority, Saily makes it easy. Built for global travellers, Saily offers Japan-compatible eSIMs that activate instantly, require no paperwork, and keep you online from the moment you land.
Why it’s worth considering:
Instant Activation: Buy online, scan the QR code, and connect. Saily’s Japan eSIMs are ready within minutes, perfect after a long-haul flight.
Reliable Coverage: Partnering with leading Japanese networks, Saily ensures strong, stable connections whether you’re in central Tokyo or exploring the countryside.
Flexible Data Plans: From casual messaging to heavy streaming, Saily has a range of data packages that suit every budget and travel style.
Global Travel Ready: If Japan is just one stop, Saily’s eSIMs cover 200+ destinations, so you can keep one plan running across your trip without swapping SIMs.
App-Based Control: Manage your data, top-ups, and plans in the Saily app. Everything is streamlined and user-friendly, so you stay in control on the go.
Best for: Travellers who want a reliable, app-powered way to stay connected in Japan and beyond, without contracts or hidden fees.
Check out Saily’s Japan options here
7. Airalo
Buy eSIMs for international travel – Airalo
If high data speed is what you’re looking for in an eSIM, Airalo offers one of the highest data speeds in Japan. With a fast average download speed of 140 Mbps, users can easily enjoy YouTube videos, video calls, and even streaming video games. Airalo makes sure that what you pay for is worth every penny.
The Airalo eSIM comes in flexible packages, with plans available for 7, 15, and 30 days, starting from 1GB for £3. A 30-day Airalo eSIM offers up to 20GB for just £20, providing a cost-effective solution. Users can easily manage their plan through the Airalo app, which simplifies activation and data management.
Airalo offers a range of eSIM options, including local, regional, and global eSIMs to cater to different travel needs. The local eSIMs provide coverage for specific countries, such as Japan, while regional eSIMs cover multiple countries within a continent or area. For those who travel frequently across different regions, global eSIMs offer connectivity in over 100 countries.
Learn more at Airalo Japan eSIM.
8. Sakura Mobile
Sakura Mobile is a trusted local Japan eSIM provider, offering a variety of eSIM plans tailored for both short and long-term visits. Their eSIM packages start at £10 for a 3-day, 1GB data plan, making it a flexible choice for travellers. Known for serving over 250,000 users, Sakura Mobile provides fast data speeds up to 85Mbps, ensuring seamless browsing, streaming, and video calling across Japan.
While Sakura Mobile Japan is popular for its eSIMs, it’s more recognised for Sakura Mobile Pocket WiFi and physical SIM card services.
9. Holafly eSIM
Holafly is a popular eSIM provider known for its straightforward activation process and global coverage, including options for travellers to Japan. Holafly offers data-only plans, with no need for roaming fees or complex setup.
Users can simply scan a QR code for instant activation, and the eSIM works across various devices like iPhones and Androids. They provide 24/7 customer support, ensuring a seamless travel experience. Holafly also allows unlimited data plans for certain countries, making it ideal for long stays and heavy data usage.
10. Klook eSIM
Klook offers flexible eSIM options tailored for travellers seeking convenience and reliable data while abroad. With coverage in Japan and many other regions, Klook’s eSIMs are easy to purchase online and activate before travel.
By eliminating the hassle of physical SIM cards, Klook makes it simple for users to switch between data plans via a user-friendly app. Travellers can compare different plans on the Klook platform to find the best eSIM based on their destination and data needs, ensuring they remain connected throughout their trip.
Japan eSIM comparison table
Here are the ten providers side by side. Networks, plan ranges and hotspot support come from each provider’s own Japan page, checked in August 2026. Prices are the cheapest Japan plan listed at the time of checking, with US dollar prices converted to sterling as a rough guide, so treat them as a starting point and check the provider’s page before you buy.
| Provider | Japan networks | Fixed data plans | Unlimited plans | Hotspot | From price | Best for |
|---|---|---|---|---|---|---|
| Nomad eSIM | KDDI au, SoftBank | 1GB to 50GB | Yes, 3 to 21 days | Yes | US$4 (about £3) | Flexible plan choice and hotspot sharing |
| Revolut | Not named by Revolut | 1GB to 20GB | No | Yes | £1.50 | Revolut customers who want in-app top ups |
| Japan Wireless | KDDI au, NTT Docomo | 1GB to 50GB | Yes, 1 to 30 days | Yes | US$5.39 (about £4) | Longer stays, with a pocket WiFi backup if the eSIM fails |
| Ubigi eSIM | KDDI, NTT Docomo | 1GB to 50GB | Yes, 7 to 30 days | Yes | US$4 (about £3) | Dual network coverage and monthly recurring plans |
| Jetpac | Docomo, KDDI, SoftBank (multi network) | 1GB to 40GB | Yes, 30 days | Yes | US$5 (about £4) | Perks like airport lounge access if your flight is delayed |
| Saily | Not named by Saily | 1GB to 20GB | Yes, 5 to 30 days | Yes | US$3.99 (about £3) | App extras such as ad blocking and virtual location |
| Airalo | SoftBank plus one other | 500MB to 20GB | Yes, 3 to 30 days | Not stated | US$4 (about £3) | A well known global brand with a Japan-only Moshi Moshi plan |
| Sakura Mobile | KDDI au, NTT Docomo | Daily allowance plans (3GB a day), 1 to 90 days | Yes, 1 to 31 days | Yes, capped | ¥1,650 for one day | Japan-based support and paying in yen |
| Holafly eSIM | KDDI, SoftBank | None, unlimited only | Yes, 3 to 30 days | Yes, 1GB a day | US$11.90 (about £9) | Unlimited data without choosing an allowance |
| Klook eSIM | SoftBank 5G, Docomo 4G | 500MB to unlimited | Yes, 1 to 30 days | Yes | £0.60 | The lowest entry price, bought alongside Klook bookings |
Choosing the Best eSIM for Japan
When selecting the ideal eSIM for your Japan trip, it’s important to assess key factors to ensure it aligns with your travel needs and budget. Here’s a breakdown of what to consider:
Network Coverage
For seamless connectivity, you need to check the network coverage. Most Japan eSIMs provide robust coverage across major cities, but if you’re travelling to rural areas, make sure the provider covers those regions too. Your travel itinerary will determine which provider is most suitable.
Data Plans
The amount of data you need is crucial, especially if you’re navigating with apps or using social media. Most eSIM providers offer a range of 5G/LTE plans, from 3GB for a short 7-day stay to 40GB for longer trips. Be mindful of the average cost to travel to Japan and how much data you’ll need based on your travel duration.
Pricing
How much does it cost to travel to Japan? While this varies depending on your itinerary, data costs are an important part of your travel budget. Each eSIM provider has unique pricing, so compare these options to ensure you’re getting the best deal. Factor in any hidden fees or top-ups, as they can add to your cost to travel to Japan.
Additional Features
Beyond basic connectivity, some eSIM providers offer perks like multi-device support, hotspot sharing, customer service, and even access to airport lounges. Evaluate these extras when determining which eSIM will provide the best value and enhance your trip.
Jetpac plans explained: JetFlex and JetPro
Jetpac, number five in our list, offers affordable, high-speed mobile data across Japan, with simple activation and good network coverage. Through its mobile app you can pick the plan that suits your travel needs.
Its perks include complimentary airport lounge access if your flight is delayed, and two subscription style plans, JetFlex and JetPro, which we explain below. Forget the hassle of physical SIM cards; Jetpac eSIM makes staying connected in Japan simple and stress-free.
Jetpac also gives you flexibility, whether for a short visit or an extended stay in Japan, allowing you to skip the long queues at mobile shops. You can purchase and activate the eSIM before your trip, so you’re ready to go as soon as you land, and Jetpac includes a 30-day free trial of ExpressVPN.
JetFlex: top up data across 150+ destinations
The JetFlex plan from Jetpac eSIM offers maximum flexibility for travellers who need a more adaptable eSIM data solution. With JetFlex, users can purchase data packages that work across multiple countries, making it ideal for multi-destination trips.
Travellers can top up data as they go and enjoy seamless connectivity, no matter where their journey takes them. The plan is perfect for those who prioritise freedom and flexibility in their mobile data experience.
Learn more about JetFlex here.
JetPro: the subscription plan for frequent travellers
The JetPro Plan is aimed at frequent travellers who want more data and extra perks.
JetPro members enjoy 7GB of global data per month across 100+ destinations, ensuring premium, reliable coverage. The plan also includes 2 monthly Lounge Access Passes and Fast Track passes, with stackable options that remain valid for up to 9 months.
You can pay monthly or quarterly.
Find more details about JetPro here.
