You need internet to navigate Tokyo’s labyrinthine train system, translate local menus, and book the perfect ryokan. Japan is one of the most tech-forward countries on the planet, but paradoxically, getting reliable eSIM coverage as a tourist can be a little tricky. Here’s everything you need to find the best eSIM for Japan, and how the country’s fair usage policy affects unlimited plans.
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Getting an eSIM for Japan
Having access to the internet as you explore Japan is essential — it’s 2026. Whether you’re trying to find the best restaurants in Shinjuku, reserve seats on a bullet train, or get your tickets to Super Nintendo World, you need internet access. I’ve been using eSIMs since 2023 and they’ve totally changed the way I travel.
However, in the last year or two I saw a lot of Reddit posts complaining about eSIMs not working in Japan. So something about getting a solid connection there was tricky, but it’s improved a lot recently. I’ll point out Airalo still seems to be having some [1] issues [2], but that’s not unusual.
Saily, Superalink, and Roamless are all reliable eSIM companies that work in Japan. Sakura Mobile is also a local option you can set-up before you arrive. No need to find their kiosk at the airport after a long flight.
The 4 best eSIMs for Japan
There are so many options out there, it can be hard to figure out which is the best eSIM for Japan. Here are the top eSIM companies to check out and how they suit different travel styles.
Saily is the best eSIM for Japan because of its unique digital security features. You can set your geo location to look like you’re in another country (like a VPN), block ads and “adult sites,” and turn on web protection, which staves off malware and data theft.
Beyond the security features, Saily is always well-priced and they have set packages or an unlimited option for Japan. There’s also a cool widget feature for iPhone, which makes it super easy to see where you’re at with your data package.
If you’re travelling long term, Saily Ultra is their subscription model. It’s one of the best eSIMs with monthly subscriptions, with 5 GB, 10 GB, or 30 GB of data that auto-renews and works globally. It also gives you one airport lounge pass per month! A pretty nice perk, especially if you have a long layover on your way to/from Japan.
For more details, here’s my honest Saily eSIM review.
Superalink has kind of surprisingly low prices. Almost too good to be true, but it’s backed by a pretty solid 4.3-star rating on Trustpilot.
The eSIM provider offers additional perks (which change, so don’t be mad at me if they’re not exactly the same by the time you read this). But for example, at the time of writing, a Superalink eSIM for Japan came with ¥500 off GO Taxi. That should take some of the sting off the ¥25,000/1.5-hour drive from Narita Airport to downtown Tokyo.
Superalink also has something called Supera Care, the “world’s first failure-proof eSIM guarantee.” It’s kind of like insurance for your eSIM. If your service drops out and you have to rack up roaming charges to make emergency calls or something, Supera Care would cover those costs.
Roamless is the best eSIM for Japan if you want to make local and international calls (even to landlines). It uses VoIP, which lets you call out for a few cents per minute — the outgoing rates depend on the destination you’re calling. If you’re old enough to remember Skype, its like that.
Roamless is also unique in that it’s the only eSIM company with pay-as-you-go. You can opt for a “Flex” plan that works anywhere in the world and uses credit you top-up as needed for calls and data. The credit never expires, so even if you get back from Japan with credit left over, you can use it on your next trip (nearly) anywhere in the world.
I explain more about how it works in my Roamless eSIM review.
Sakura Mobile is Japan-specific rather than a global or regional provider, and that focus shows in the details. Their eSIM runs on docomo and au — two of Japan’s actual mobile carriers, so it tends to hold up better in rural spots. You can also get a physical SIM card or pocket Wi-Fi, but the eSIM makes the most sense to me.
Note: Sakura Mobile’s unlimited data is somehow exempt from Japan’s fair usage policy. (More on this below.) This makes it a unique unlimited option, which is hard to find and makes this the best eSIM for Japan if you’re a heavy data user.
No discount code for Sakura Mobile, sorry y’all. But they often have little promotions on.
Travel essentials for Japan
📶 smartEX App
Book Shinkansen train tickets and reserve seats directly from your phone.
💸 TravelSpend
Track your budget easily (ft. a colourful doughnut chart with stats).
✈️ Seats.aero
Find and book flights to Japan with your Aeroplan, Qantas, Delta points & more.
💳 Wise or Revolut
Compare the best multicurrency cards for spending JPY like a local.
Japan's fair usage policy (FUP)
Japan has a fair usage policy on all tourist eSIMs to prevent network congestion. So while I usually recommend providers with unlimited data, like Holafly, it’s not necessarily worthwhile for Japan, so I haven’t included it here. You’re better off finding a better price and aiming to use less than 3 GB per day.
According to Japan Travel, your data speed will drop significantly after you’ve used 3 GB to 5 GB of 4G/5G network data. That sounds like a lot, but Saily’s Data Calculator estimates that streaming and video calls use about 1 GB of data per hour.
So if you’re trying to call home, have video work meetings, or stream your favourite TV show every night after long days of exploring, you’ll chew through that quickly. Unlimited plans are typically the most expensive option, and this is a rare occasion where it’s not worth it.
Still not sure which eSIM is for you?
I’ve compared 14 providers with prices, discounts, perks, refund policies, support, device compatibility… the whole deal. I update my eSIM comparison Google Sheet regularly.
FAQs about finding the best eSIM for Japan
Here are some quick answers to frequently asked questions you might have to find the best eSIM for Japan.
Will an eSIM work with my phone?
Certain phone models support some eSIMs, but not all. However, if you have even a mostly new-ish smartphone you’ll be totally fine.
Each eSIM provider has a detailed list somewhere on their site of which phones are compatible. But be careful about this — don’t just assume! Most providers will have something in the T&Cs about not refunding eSIMs just because your phone isn’t compatible.
Can I get an eSIM for more countries in Asia?
You sure can. Most eSIM companies have regional Asia packages that include Japan other parts of Southeast Asia, or even the wider region. For example, Saily has an Asia & Oceania package that covers 22 countries, including Japan. You can see the full list to make sure it covers all your destinations before you commit.
Will my eSIM work for my laptop in Japan?
Only some Windows laptops like Dell and HP have eSIM-compatible models. Mac hasn’t released this feature yet, but some iPads and tablets can do eSIMs. Worst case, you can always hotspot from your phone to your laptop — I do this allllll the time. Most eSIM companies allow for hotspotting these days, but double check their terms just in case.
Can I use an eSIM and normal SIM at the same time?
Yes, you can keep your home SIM chip and switch on your Japan eSIM. This is useful if you need to receive two factor authentication (2FA) texts connected to your home number. You can usually receive texts internationally, but not send them.
Just be careful when using a SIM and eSIM at the same time — you could accidentally rack up a huge roaming charge back home! If you need to make lots of calls, Roamless’ VoIP lets you call out while keeping costs low.
Naomi Lai
Naomi is a Canadian travel editor and writer with 13 years of international travel across Southeast Asia, Europe, South America, New Zealand, and beyond. She covers everything from budget backpacking to luxury travel — always from personal experience.
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