Japan eSIM
Choose from 13 available byOne travel eSIM plans, with instant digital delivery and no physical SIM swap required.
- Instantdigital delivery, install everywhere
- 13 plansto choose from
- $2.00starting price
Choose your plan
- 5G
- Data only — no phone number
- Power up your data now
How much data do I need?
Tell us about your trip and we'll pick the right plan.
Where will my Japan eSIM work?
Plans start from 500 MB for 7 Days.
Network
- SoftBank
- KDDI
Average speeds
5G
Where it works
-
Japan
Is your phone eSIM ready?
Check your device before you buy — most phones from the last few years support eSIM.
Check CompatibilityNeed data for more than just Japan?
Everything about your Japan eSIM
Use a Japan eSIM to stay connected
Staying connected makes every trip easier — live maps, ride-hailing, translation, mobile payments and sharing the moments as they happen.
A byOne Japan eSIM installs in about 90 seconds and connects automatically when you land, so you skip the airport SIM queue and start browsing right away. Buy before you fly, top up any time, and reuse it on your next visit.
How much travel data do I need in Japan?
How much data you'll need in Japan depends on a few factors: the Wi-Fi situation where you're staying, and how much time you'll be spending online.
Will you be traveling around nearby areas or on day trips where there won't be reliable Wi-Fi?
The great thing about eSIM data is that you can start with a small package and easily add more if you need it.
Will I pay roaming charges with a Japan eSIM?
Not a penny in roaming charges.
When you're using a Japan eSIM for travel data, your device connects directly to a local network instead of roaming, giving you prepaid data to use during your trip.
Japan eSIM questions
Common questions about coverage, activation, and data in Japan.
How fast does my Japan eSIM activate?
Most Japan eSIMs activate within a couple of minutes of installing the profile. Some plans start counting validity from installation, others from first connection to a local network — check the plan details before you buy.
Can I use my Japan eSIM alongside my regular SIM?
Yes, as long as your device supports dual SIM with eSIM. Keep your regular number for calls and texts, and use the byOne eSIM for data.
What happens if I use all my Japan data before the plan expires?
You can top up with additional data at any time from your byOne account, or purchase a new plan for your remaining trip.
Does coverage in Japan include rural or remote areas?
Coverage follows the partner network footprint shown on the plan, which is typically strongest in cities and major towns. Check the plan details for the specific network used.
What travelers say about Japan eSIM
“Used this for two weeks across Tokyo, Osaka and Kyoto — coverage never dropped, even on the shinkansen.”
“Super easy install before I even landed in Narita. Data ran out a day early on the unlimited-lite plan, but topping up was painless.”
