eSIM for Japan: free data, GBs, or unlimited from €2/day
One eSIM for Japan. No roaming bill, no SIM swap, no commitment.
Stay connected around the globe
Choose data plans: Firsty Free, Classic, or Unlimited
Travel and stay connected without roaming costs
Make international calls in selected countries
Firsty connects you to Japan's three biggest networks
Firsty connects you to NTT Docomo, KDDI (au), and SoftBank through a single eSIM that activates in under 60 seconds. Start free by watching ads, buy GBs that never expire, or go unlimited from €2/day. The same eSIM works in 176 other countries when your trip continues.
No contracts. No fair use traps. No €30 daily roaming charge from your home operator.
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Why Firsty is different in Japan
Same price as everywhere else Other eSIM apps charge more for Japan than for Spain or Portugal. Firsty doesn't. €0.98 per GB on Prepaid, €2/day on Unlimited the same as it would be if you were in Mexico, India, or Italy. One price, everywhere.
Buy data that never expires Most travel eSIMs make you buy GBs that expire in 7 or 30 days use it or lose it. With Firsty Prepaid, the GBs you buy stay on your account forever. Bought 10 GB and only used 3 in Tokyo? The other 7 are still there for your next trip to Seoul, Bangkok, or anywhere else.
How it works
How Firsty works in Japan
How much data do you need in Japan?
Casual sightseer
Active traveler
Heavy user / remote worker
Real benchmarks
Aww, We love you too!!
Where's Life Taking You next?
Get connected to the Firsty Network
Price table
Prepaid (use anywhere, never expires)
Data | Price | €/GB |
|---|---|---|
1 GB | €4,50 | €4,50 |
3 GB | €7,50 | €2,50 |
5 GB | €9,50 | €1,90 |
10 GB | €17,00 | €1,70 |
20 GB | €26,40 | €1,32 |
50 GB | €49,00 | €0,98 |
Unlimited (day pass or monthly)
Duration | Price | €/day |
|---|---|---|
1-6 days | €3,00/day | €3,00 |
7-14 days | €2,75/day | €2,75 |
15-19 days | €2,50/day | €2,50 |
20+ days | €2,20/day | €2,20 |
Monthly subscription | €59/month | €2,00 |
Where in Japan does Firsty work?
Tokyo: Full 4G/5G on Docomo and KDDI. Subway tunnels covered.
Kyoto: Strong signal throughout the historic district and surrounding temples.
Osaka: Multi-network coverage; reliable in Dotonbori and across the city.
Hokkaido: Docomo coverage extends to Sapporo, Niseko, and most rural areas.
Okinawa: Full coverage across the main island and most tourist destinations.
Mount Fuji & Hakone: Multi-network coverage; rural sections covered by Docomo.
Questions? We've got you.
Land in Tokyo. Stay connected. Install Firsty before you leave. Start free, upgrade if you need more, keep what you don't use. One eSIM, no surprises.
Does Firsty work everywhere in Japan?
Firsty connects to NTT Docomo, KDDI (au), and SoftBank, Japan's three largest networks covering 99.9% of the population. You'll have signal in major cities, on bullet trains, in mountain resorts, and on most Japanese islands.
How do I activate my eSIM when I land in Japan?
You don't need to wait. Set up Firsty before you leave, when you land at Haneda, Narita, Kansai, Chubu, or Fukuoka, your eSIM activates automatically as soon as your phone connects to a network.
What happens to my Prepaid GBs if I don't use them in Japan?
Nothing. They stay on your account. Firsty Prepaid GBs never expire. You can use the rest of your data on your next trip, anywhere in 176 countries.
Is Firsty Free enough for a trip to Japan?
For light use: messaging, maps, Uber, email, yes. The free tier runs at basic speed and you earn data by watching short ads. For HD video, streaming, or hotspot, you'll want Prepaid or Unlimited.
Is Firsty cheaper than buying a SIM at the airport?
Almost always. Airport SIMs in Japan typically cost €30–50 for 7 days. Firsty Prepaid is €0.98/GB, so a 10 GB trip is under €15. Free tier is genuinely €0.
Can I make calls and send SMS with Firsty in Japan?
Firsty is a data eSIM: calls and texts work through WhatsApp, FaceTime, iMessage, or any internet-based app. International calling to 200+ countries is available through the Firsty app at transparent per-minute rates.
Does Firsty work on the Shinkansen?
Yes. Because Firsty connects to multiple Japanese carriers, you'll keep signal during high-speed train travel, including the network handoffs that drop single-carrier eSIMs.
What if I run out of data in Japan?
Open the Firsty app and top up instantly, buy more GBs or extend your Unlimited pass. Or watch an ad to extend your free tier.
What devices work with Firsty in Japan?
Any eSIM-compatible phone bought in the EU, US, UK, Canada, Australia, or Japan after 2018. iPhone XS or newer, recent Samsung Galaxy, Google Pixel, and most other modern Android phones.