Japan eSIM Compared 2026: SoftBank, KDDI Native or Dual-Network (Android Users Read This First)
There are three Japan eSIM lines to choose from: SoftBank native, KDDI native, and KDDI／SoftBank dual-network. This guide lays out how the three differ and who each one suits, so you can see which fits your trip.
Our top recommendations are SoftBank native and KDDI native. Both run on Japanese native networks and deliver fast, stable connections. SoftBank native offers five plans (1GB, 2GB, 3GB or 5GB per day, or unlimited), each available from 1 day up to 30 days, which makes it the first choice for iPhone travellers who want to match data to their itinerary. KDDI native is built around high-speed unlimited data, ideal for all-day navigation, uploading video or other heavy use. On an Android phone we recommend KDDI native, which works on Android and iPhone; if you want to pick your own data and days, the KDDI／SoftBank dual-network eSIM is another option.
New to Japan eSIMs? Start with our Japan travel eSIM guide. This article focuses on comparing the three lines.
Japan eSIM comparison: the three lines side by side
| SoftBank native (top pick) | KDDI native (high-speed unlimited) | KDDI／SoftBank dual-network | |
|---|---|---|---|
| Best for | First choice for iPhone | First choice for Android and heavy data use | Android users who want to choose their own data and days |
| Network | SoftBank native line in Japan | KDDI native line in Japan | KDDI and SoftBank, automatically picks the stronger signal where you are |
| Speed and stability | Native line, fast and stable | Native line, high-speed and stable | Switches automatically between two carriers |
| Data plans | 1／2／3／5GB per day or unlimited, five plans to choose from | High-speed unlimited | Total data, daily data or unlimited |
| Days | Every plan from 1 day up to 30 days | 3 to 15 days | 1 to 30 days |
| Phones | iPhone (optimised for iPhone) | Android and iPhone (any eSIM-compatible phone) | Android and iPhone |
| Coverage | All of Japan, including Okinawa | All of Japan, including Okinawa | All of Japan, including Okinawa |
| Ideal if you | Use an iPhone, want to choose your own data and days, and value speed and stability | Use an Android phone; drive all day with navigation, upload photos and video, or share data with other devices | Use an Android phone and want to choose daily or total data and days |
All unlimited plans are subject to a fair usage policy.
How to choose a Japan eSIM: your phone and your data use
SoftBank native: our top Japan eSIM for iPhone
SoftBank native | First choice for iPhone
SoftBank is one of Japan's major carriers, and its native line is fast and stable. Choose from 1GB, 2GB, 3GB or 5GB per day, or unlimited, with every plan available from 1 day up to 30 days, so there is a good fit for any trip length and usage. Your QR code arrives about 10 minutes after payment, with a guaranteed refund if the network is unstable or the eSIM is unused.
See SoftBank native plans →This eSIM is optimised for iPhone. On an Android phone we recommend KDDI native, or the KDDI／SoftBank dual-network eSIM if you want to pick your own data and days.
KDDI native: the high-speed unlimited Japan eSIM we recommend for Android
KDDI native | First choice for Android, high-speed unlimited
KDDI is one of Japan's major carriers. KDDI native gives you high-speed unlimited data on a fast, stable line and works on Android and iPhone (any eSIM-compatible phone), ideal for all-day driving with navigation, uploading photos and video on the go, or sharing data with other devices. Available for 3 to 10 days or 15 days; unlimited plans are subject to a fair usage policy.
See KDDI native plans →KDDI／SoftBank dual-network: when you want to choose your own plan
The KDDI／SoftBank dual-network eSIM supports both carriers and automatically connects to whichever has the stronger signal where you are. It installs on Android and iPhone, with total-data plans (3／5／10／20GB), daily plans (1／2／3GB per day) and unlimited, from 1 to 30 days. It is an option for Android users who want to choose daily or total data and days.
Choosing a Japan eSIM data plan
- Daily data: a fixed allowance each day. Once it is used, speed drops to 128kbps until it refreshes the next day.
- Total data: one allowance for the whole trip that stops when used up, suited to steady usage.
- Unlimited: ideal for heavy data days, subject to a fair usage policy.
For typical city sightseeing we suggest 2GB to 3GB per day for comfortable headroom. If you will drive with navigation all day, upload video or share data, go straight for unlimited.
About fair usage: unlimited plans run smoothly for normal travel use. If a very large amount of data is used in a short time (for example hours of HD streaming or backing up an entire photo library to the cloud), the carrier may adjust speeds.
Daily reset and day counting
- SoftBank native: the daily allowance resets at 23:00 Japan time.
- Day counting (all three lines): counting starts when you scan the QR code; day one runs until 23:59 Taiwan time and day two begins at 00:00.
- QR code valid for 30 days: order a day or two before departure and scan it on the day you leave.
Japan eSIM coverage
All three Japan eSIMs share the same coverage: all of Japan, including Okinawa. Tokyo, Osaka, Kyoto, Nagoya and Fukuoka, including their subway stations, are covered, as are suburbs and sightseeing areas across the country. If you are driving into the mountains or remote areas, downloading an offline map beforehand makes the trip even smoother.
How to install a Japan eSIM
Step-by-step screenshots are in our eSIM installation guide. eSIM does not work on iPads, tablets, custom-built phones, contract-locked or carrier-locked phones, or jailbroken／rooted devices.
Japan eSIM FAQ
Which Japan eSIM is best for an Android phone?
On Android we recommend KDDI native: high-speed unlimited, and it works on Android and iPhone. If you want to pick daily or total data and days, the KDDI／SoftBank dual-network eSIM is another option. SoftBank native is optimised for iPhone and is our recommendation for iPhone users.
What is the difference between SoftBank native and KDDI native?
Both are native lines from major Japanese carriers, with fast and stable connections. SoftBank native offers a wide choice of plans, from 1GB per day to unlimited and from 1 to 30 days; KDDI native focuses on high-speed unlimited data for heavy use.
How much data do I need per day in Japan?
For typical city sightseeing, 2GB to 3GB per day gives comfortable headroom. For driving with navigation, uploading video or sharing data, choose unlimited.
When does the daily data reset?
SoftBank native resets at 23:00 Japan time. Day counting starts on the day you activate, with day one running until 23:59 Taiwan time.
Can I use a Japan eSIM in Okinawa?
Yes. All three Japan eSIMs cover all of Japan, including Okinawa.
Can I share a hotspot?
Hotspot sharing is available, but whether it connects smoothly depends on your phone and the connected device. We recommend one eSIM per phone and advise against prolonged hotspot use.
Japan eSIM | Pick the line that fits your phone and your trip
- SoftBank native: first choice for iPhone, choose your own data and days, fast and stable
- KDDI native: first choice for Android, high-speed unlimited, fast and stable
- KDDI／SoftBank dual-network: for Android users who want to choose their own data and days
- Guaranteed refund if the network is unstable or the eSIM is unused; LINE @peanutmo (10:00–17:00 UTC+8)
Further reading
What 128 kbps really feels like, and how much data to buy.
Per-app and per-day numbers, plus how day counting works.
Five settings that resolve most no-service problems on arrival.
iPhone and Android screenshots, from scanning to data roaming.
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