Disclosure: this is a paid partnership with Holafly. Japan Nakama is paid for this article, and the Holafly links in it are commercial links.
Planning a trip to Japan demands reliable connection from the moment you land. You need data to communicate, navigate complex transport systems, document experiences, and upload photos and videos on the go. An eSIM is the obvious solution, because every other option adds friction you don’t have time for.
When the focus should be on food, neighbourhoods, and experiences, Holafly removes the hassle with unlimited data, instant delivery, and round-the-clock support. Holafly’s Japan eSIM starts from £4.00 and gives unlimited data on fast 4G and 5G across Japan.
Your Holafly eSIM Guide for Seamless Japan Travel
What is an eSIM?
An eSIM (Electronic SIM) is a digital version of a physical SIM card that is embedded in your smartphone. Unlike traditional SIMs, an eSIM for international travel allows users to remotely activate a mobile data plan without needing to swap out a physical card.
Travellers will find this useful because they won’t have to buy local SIM cards or pay any international roaming fees. With opportunities to buy an eSIM online, people can now plan their trip in advance and arrange for connectivity before even setting foot in another country.
Having an eSIM for travel also lets you effortlessly switch between mobile carriers and plans while abroad.
How a Travel eSIM Works in Four Steps
Before you embark on your journey to discover Japan, it’s essential to know how travel eSIM works. The process is simple:
- Choose an eSIM provider: Research the different options, starting with our guide to the best eSIM for Japan.
- Select a data plan: Find one that fits your trip duration and data needs.
- Install and activate: After purchasing the eSIM, you’ll receive a QR code to scan, activating your eSIM on your mobile device.
- Configure your eSIM: Set up the data plan on your phone, and you’re ready to go!
By installing and activating your eSIM before travelling, you’ll avoid any connectivity issues upon arrival, ensuring you’re fully connected as soon as you land in Japan.
Our Pick For Best eSIM for Japan Travel: Holafly
The comparison is simple: in Holafly’s own matrix, unlimited data, no hidden fees, instant connection, and reliable coverage all score for Holafly, while local providers and limited-data eSIMs typically miss one or more of those boxes (see the comparison graphic further down this page).
- Unlimited data, no top-ups: Choose 1 to 90 days; your plan runs for the exact number of days you buy. No meter anxiety.
- Fast & reliable: High-speed coverage across Japan on the KDDI and SoftBank networks, with 5G where available; performance suitable for video calls, uploads, and maps.
- Clear Fair Usage Policy: In rare cases a local operator may reduce speeds after very heavy use. This lasts no more than one day, and your normal speed returns the following day.
- Instant delivery & easy install: Your QR code arrives by email straight away. Set up before you fly; activate on arrival.
- Keep your WhatsApp number: Your chats and number stay the same.
- Hotspot sharing: Share up to 1 GB a day with family or a second device via your phone’s Wi-Fi hotspot.
- Refunds that respect real life: Full refunds available if your plans change before the eSIM is activated, or if your device turns out to be incompatible or locked, and full or partial refunds for network issues at your destination that prevent use (conditions apply).
- 24/7 support: Live chat and email help at any hour.
Set-up checklist (5 minutes)
- Buy your plan before your trip: Pick the number of days you need (more days = lower daily price).
- Install the eSIM: On iPhone: Settings → Mobile Data → Add Data Plan → scan QR or enter code manually.
- Label lines: Keep your physical SIM for calls/SMS; set Holafly as Mobile Data.
- Before you fly: Leave the Holafly line installed but off.
- On landing (HND/NRT/KIX): Toggle Holafly line ON + Data Roaming ON → you’re online in seconds.
Tip: Print the QR code or save it offline; install requires an internet connection the first time.
Worked example: landing at Haneda or Narita
- 00:00 Wheels down. While taxiing, open Settings → Mobile Data.
- 00:30 Turn Holafly line ON; ensure Data Roaming is ON.
- 01:00 Signal appears (4G/5G). Open Maps to check the Keikyū route to Shinagawa.
- 03:00 Message your hotel on WhatsApp. If needed, tether 1 device for quick email sync (keep under 1 GB a day).
- All day: Track usage or extend days in the Holafly app.
Should I Install an eSIM Before Travelling to Japan?
Travellers often ask, “Can I install my eSIM before travel?” and the answer is yes!
It’s highly recommended to install your eSIM before travelling. Not only does this ensure that you’re ready to go as soon as you land, but it also eliminates the hassle of searching for a physical SIM card upon arrival.
Installing it beforehand guarantees a smooth transition from your local network, allowing you to stay connected as soon as you arrive in Japan.
Configuring your eSIM
Once you have a data plan in mind from your chosen provider, check if your mobile device is compatible with eSIM technology. Most newer phone models are eSIM compatible, but it’s worth double-checking your exact model before you buy.
If your device is compatible with eSIMs and you’ve found your ideal data plan, it’s time to purchase and activate your new eSIM. Most eSIM providers present a QR code you need to scan that shows the instructions for activating your eSIM.
After successfully activating your eSIM, configure your device to use the eSIM. This means setting up your eSIM, confirming your data plan, and booting it up. It’s a straightforward process, though your provider is still more than willing to guide you. The last step is to prepare your eSIM for travel by testing it before your trip to make sure it works well. This is to avoid any complications regarding connectivity while abroad. Test the data roaming, check your mobile settings, and confirm that your eSIM is good to go.
Local Japan SIM Cards Compared With an eSIM Bought Online
Buying a local Japan SIM card is way more inconvenient than purchasing an eSIM online. Once you’ve arrived, you’ll need to find a store that sells SIM cards for Japan, which often involves waiting in long lines, dealing with language barriers, and navigating unfamiliar pricing plans.
Additionally, not all retailers may have the SIM card that fits your data needs, and availability can be limited, especially in rural areas. On the other hand, purchasing an eSIM online allows you to preorder a Japanese eSIM from the comfort of your home.
Can I Use an eSIM in Japan?
The simple answer is yes, you can use an eSIM in Japan. eSIMs are available in almost every region in Japan, with their eSIM market booming due to the influx of tourists and travellers. Instead of looking around to buy a physical SIM card in Japan, you can easily purchase an eSIM by downloading it through eSIM company websites or travel apps.
In Japan, there is a high need for reliable connectivity to access navigation apps, train schedules, and taxi-hailing apps. Therefore eSIMs also give a sense of security by providing a constant data connection state. Especially in case of emergencies or unexpected situations while travelling in Japan.
At least seven eSIM carriers in Japan provide different features for each traveller’s needs.
Who are Holafly?
Holafly provides international eSIMs with unlimited data plans, immediate delivery by email, and round-the-clock support. For Japan, plans start from £4.00 with flexible durations (1 to 90 days) and straightforward refunds if your device is incompatible, your plans change before the eSIM is activated, or the destination network is unstable (conditions apply). Browse plans and pricing here: Holafly Japan eSIM.
How Does Holafly eSIM Compare to Other eSIMs?
When you stack Holafly against other international eSIM options, it’s an easy front-runner for Japan. You get unlimited data, quick 4G/5G speeds, instant email delivery, and 24/7 support, plus a fair refund policy if plans change. Setup is straightforward on modern eSIM-ready phones (check compatibility here), and you can manage or extend your plan.
What are the Benefits of a Holafly eSIM?
- Unlimited data in Japan, no top-ups, no rationing.
- Fast and reliable internet (4G/5G) for video calls, uploads, and navigation.
- Keep your WhatsApp number, no change to chats or contacts.
- Hotspot sharing: tether up to 1 GB a day to family or a second device.
- Immediate delivery to your inbox; install via QR code or manual code.
- Secure payment options (Visa, Mastercard, Google Pay, Apple Pay, PayPal).
- Trustpilot-rated “Excellent”, see Holafly on Trustpilot.
Fair Usage Policy (FUP): in rare cases, a local network operator may temporarily reduce speeds after exceptionally heavy use. Holafly says this lasts no more than one day, and your normal speed returns the following day. If you suspect throttling, contact the 24/7 chat or email help@holafly.com and Holafly will check and help restore the maximum available speed.
Holafly Rewards: the HolaCoins Loyalty Programme for Travellers
Holafly Rewards gives eSIM users HolaCoins from purchases and referrals, redeemable on future plans (100 HolaCoins = €1; exclusions apply). Your status is tracked via Level Points (1 LP per HolaCoin), unlocking higher cashback at Gold (350 LP) and Platinum (1,000 LP).
A referral link lets friends get a discount at checkout while you earn HolaCoins once their eSIM is activated; manage everything in the Holafly app.
Earn HolaCoins by purchasing eligible Holafly eSIMs or sharing your referral link (annual/monthly plans and Holafly for Business excluded). HolaCoins are added automatically once the eSIM is activated and can be redeemed on future orders through Holafly Rewards in the Holafly app. Referral rewards apply once your friend’s eSIM is activated. Terms apply, details may change, so check your account dashboard.
Join Holafly Rewards today for cashback in HolaCoins, which you can put towards discounts or even free eSIMs on future trips. If you’ve bought a Holafly eSIM before, you’re already in: just log into the Holafly app to view your balance and perks.
How HolaCoins and Level Points Work
- Earn HolaCoins on every eligible eSIM purchase and via referrals.
- Redeem for discounts at checkout: 100 HolaCoins = €1.
- Level up with Level Points (LP): 1 HolaCoin = 1 LP. Higher levels unlock higher cashback and referral rewards.
Holafly Rewards Levels: Silver, Gold and Platinum
Level 1: Silver (unlocked with your first purchase)
- 5% cashback in HolaCoins on every purchase
- +500 HolaCoins per successful referral
Level 2: Gold (from 350 LP)
- 6% cashback in HolaCoins on every purchase
- +600 HolaCoins per successful referral
Level 3: Platinum (from 1,000 LP)
- 7% cashback in HolaCoins on every purchase
- Priority access to Customer Support
- +700 HolaCoins per successful referral
Save up enough HolaCoins and you can cover a full plan, which means a free eSIM for your next trip.
Joining Holafly Rewards in Three Steps
- Purchase a Holafly eSIM for any destination.
- Log into the Holafly app using the email from your purchase.
- Open Holafly Rewards in the app to track your HolaCoins and Level Points.
5% Off Holafly With a Discount Code
Holafly’s website currently shows the code MYESIMNOW5 for 5% off your purchase. Enter it at checkout before you pay.
Holafly Japan eSIM Prices From £4
Plans start from £4.00 and let you pick exactly the number of days (1 to 90) you need, and the more days you buy, the lower the daily price. You can renew or extend anytime; the extra days activate instantly on your existing eSIM.
Holafly Refund Options
- Change of plans, if the eSIM has not yet been activated.
- Incompatible or locked device discovered after purchase, as long as the QR code has not been scanned.
- Verified connection issues (full or partial refund, per policy).
- Requests can be made up to six months after purchase, and approved refunds are returned to your original payment method (see full policy).
Holafly Data in Japan, From Shibuya Crossings to Oita Onsen
From Shibuya crossings to Kyoto’s temples and Oita’s onsen (温泉), reliable data makes travel smooth. Install your Holafly Japan eSIM, land, toggle Data Roaming ON, and you’re online in seconds, no roaming fees, no stress.
Common FAQs About eSIMs & Holafly
How do I activate my Holafly eSIM in Japan?
After purchase, Holafly emails you a QR code and manual instructions. On your phone: Settings → Mobile Data → Add Data Plan → scan the code. Install before you fly; activate on arrival by turning the Holafly line ON and enabling Data Roaming. Need help? Contact support or use the 24/7 chat on the site.
Is Holafly eSIM compatible with my device?
Most recent iPhone, Samsung Galaxy, Google Pixel and other eSIM-ready phones are supported. Check Holafly’s compatibility list before buying.
Can I preorder a Japanese eSIM?
Yes, buy now, install before departure, and the plan starts the moment your phone first connects to a supported network in Japan. Get your Japan eSIM.
How reliable is the Holafly network in Japan?
Holafly’s Japan eSIM runs on the KDDI and SoftBank networks, with 5G where available. If speeds dip after very heavy use, the Fair Usage Policy may apply for no more than one day (see above).
How much does a Holafly eSIM cost?
From £4.00, with durations of 1 to 90 days. Choose the days you need: the more days you buy, the lower the daily price. See prices.
How many eSIMs can iPhone 14 hold?
Apple says iPhone can store eight or more eSIMs, so you can keep your home line and use Holafly for data.
What happens when my plan starts and ends?
Your plan begins on first network connection in Japan (e.g., activate at 10:00 → a 1-day plan ends at 10:00 the next day).
Can I keep my physical SIM active too?
Yes. Use your physical SIM for calls/SMS and set Holafly as your data line. Turn data roaming OFF on the physical SIM to avoid charges.
Can I make calls and send SMS with Holafly?
Holafly is data-only. Use WhatsApp/LINE for calls and messages.
How do I share data?
Enable your phone’s hotspot. You can share up to 1 GB a day with family or friends.
I deleted my QR code, now what?
Contact help@holafly.com or use the 24/7 chat; they’ll resend it.
How do I renew or extend?
Log into the Holafly app and purchase more days; it activates immediately on your current eSIM.
When should I set up my eSIM?
Before departure. Installation needs an internet connection; activation happens when you land and switch the Holafly line on. Full details.
Can I delete the Holafly eSIM after my trip?
You can, but you don’t need to. When the plan expires, the eSIM simply stops working.
