Best eSIM for Japan — Instant Data Plans
Japan eSIMs from LTE.app activate in under 2 minutes on NTT Docomo and SoftBank (also au KDDI) — no contract, no airport SIM kiosk, no roaming bill.
Planning a trip to Japan? An eSIM is the fastest, cheapest way to get data the moment you land — no queues, no Japanese-language SIM kiosks, no roaming shock.
Your calls stay on your home number.
Your data runs on LTE.app.
Most modern iPhones and Android phones support two connections at once. Keep your existing SIM active — your number never changes, your apps keep working. Just add a Japan data plan on top.
- ✓ Calls and texts work normally
- ✓ WhatsApp, iMessage unchanged
- ✓ Bank 2FA still arrives
- ✓ Nothing to cancel or port
- ✓ Full 4G / 5G speeds
- ✓ Hotspot included
- ✓ Activates the moment you land
- ✗ ~$10–15 per day, every day
- ✗ Throttled after 512 MB
- ✗ No hotspot on most plans
- ✗ Bill shock when you get home
Why LTE.app
Top cities in Japan
Same eSIM, full coverage. Tap a city for local connectivity tips, neighbourhoods, and transit notes.
Major airports in Japan
Activate before you board. Each airport guide covers Wi-Fi, ground transport, and arrival tips.
Best eSIM for Japan — what you need to know
LTE.app offers eSIM plans for Japan. Plans are instant — purchase, scan the QR code in Settings, and your data is live. No physical SIM, no airport queue, no contract.
Coverage is provided through NTT Docomo and SoftBank and au KDDI, giving you data across Tokyo, Osaka, Kyoto and beyond. Japan has world-class LTE and 5G — expect 30–150 Mbps across cities and reliable coverage even on Shinkansen bullet trains.
Why use an eSIM in Japan?
Japan eSIM coverage & networks
LTE.app plans in Japan route through NTT Docomo, SoftBank, au KDDI. Japan has world-class LTE and 5G — expect 30–150 Mbps across cities and reliable coverage even on Shinkansen bullet trains.
Major destinations covered include Tokyo, Osaka, Kyoto, Hiroshima, and Sapporo. Urban areas and popular tourist sites generally have reliable 4G LTE; rural and mountainous areas may vary.
More questions about Japan eSIMs
Does the eSIM work as a hotspot in Japan?+
Most LTE.app Japan plans support mobile hotspot (tethering), so you can share data with a travel companion or laptop.
Does the Japan eSIM include a phone number?+
LTE.app eSIMs for Japan are data-only — they don't include a Japanese phone number. Keep your home SIM for calls.
Which network will my eSIM use in Japan?+
LTE.app plans in Japan use NTT Docomo and SoftBank and au KDDI. The network your device connects to depends on your plan and device compatibility.
Can I top up or extend my Japan eSIM?+
Some plans allow top-ups or extensions from within the LTE.app. If you run out of data, you can purchase an additional plan — the new eSIM will be delivered instantly as a QR code.
Travelling nearby?
Extend your trip or compare plans for neighbouring destinations.
South Korea eSIM →
Taiwan eSIM →
Hong Kong eSIM →
China eSIM →Japan eSIM vs nearby destinations
How Japan eSIM coverage and pricing stack up against neighboring travel destinations. Tap a country to see its own plans and full coverage breakdown.
| Country | Carriers | From | |
|---|---|---|---|
| Japan← this page | NTT Docomo · SoftBank | See plans | |
| South Korea | SK Telecom · KT (Olleh) | See plans | Plans → |
| Taiwan | Chunghwa Telecom · FarEasTone | See plans | Plans → |
| Hong Kong | HKT (PCCW) · 3HK | See plans | Plans → |
| China | China Mobile · China Unicom | See plans | Plans → |
Japan
South Korea
Taiwan
Hong Kong
ChinaCarrier list is the primary partner network in each country; plans on smaller destinations may also fall back to additional roaming partners. "From" price refers to the cheapest published LTE.app plan — see each country page for current rates.
Japan by the numbers
Each figure links to its primary source — these are not LTE.app estimates.
Japan recorded approximately 25 million inbound international visitors in 2023, with travel rebounding to near pre-pandemic peaks. Source: JNTO (Japan National Tourism Organization)
Japan has one of the highest mobile-line-to-population ratios in the OECD, reflecting widespread dual-device usage. Source: OECD Broadband Portal
Docomo remains the largest mobile network operator in Japan by subscribers, followed by KDDI/au and SoftBank. Source: Japan MIC (Ministry of Internal Affairs and Communications)
Background context for Japan draws partly on Wikivoyage, licensed under CC BY-SA 3.0.
Going to Japan? Pick the right plan for how you travel.
Different travelers need different eSIM sizes and features. Pick your travel style:
What you need to know
This eSIM provides data access only. It does not include a Japan phone number. Use WhatsApp, FaceTime, or Signal for calls.
Set up the eSIM at home over Wi-Fi before your trip. Data only starts counting once you connect to a local network on arrival.
Mobile hotspot is available on most Japan plans. Share your data with a laptop or travel companion without extra cost.
Your phone must be eSIM-compatible and carrier-unlocked. Most iPhones from 2018 and flagship Android phones from 2020 support eSIM.
Your QR code is emailed the moment your payment completes — no waiting, no shipping, no airport queue.
How to install your Japan eSIM
Note for Japan: Install before you fly — you can set up the eSIM at home over Wi-Fi and activate it automatically when you land.
Full install guide with screenshots →Love the price? The savings don't stop when you land home.
Pro and Premium subscribers save up to 12% on every plan they ever buy — whether they're in Japan next week or somewhere else next year. One membership. Every destination.
Frequently Asked Questions
Can I use an eSIM in Japan?
When does my Japan eSIM activate?
Can I use mobile hotspot (tethering) in Japan?
Can I use my regular SIM and the Japan eSIM at the same time?
How fast is the data in Japan?
Do I need to show ID to buy a Japan eSIM?
Does the Japan eSIM include a phone number?
Can I buy more data if I run out in Japan?
When should I install the eSIM?
What is the refund policy?
Will my device work in Japan?
Can I transfer the eSIM to another device?
Need help choosing?
Ask Smart Coach about the best eSIM plans for Japan, compare carriers, get installation help, and more.
Japan travel connectivity
All Japan pages — linked for faster research