eSIM for Japan
eSIM for JapanData plans from $2.50. 5 plans available, online in about a minute.
SimSIM's eSIM for Japan activates online before you leave — tap to install and your phone connects to local networks the moment you land. No physical SIM, no roaming contract. Plans are valid for 7–30 days and data starts from $2.50.
Good to know before you go to Japan
Japan has exceptionally reliable, fast networks across Tokyo, Osaka, Kyoto, and along the Shinkansen bullet-train lines, with coverage holding even at high speed through tunnels in most stretches. Rural mountain areas and some smaller islands can have gaps. A classic Golden Route itinerary (Tokyo-Kyoto-Osaka) is data-light if you mostly use maps and translation (3-5GB a week is plenty), but bump it up if you plan to translate menus constantly or livestream — real-time translation apps are one of the most useful eSIM use cases in Japan given the language barrier.
Plans & pricing for Japan
Prices updated
FAQ for Japan eSIM
What is an eSIM and how does it work in Japan?
An eSIM is a digital SIM built into your phone. Instead of a physical card, you tap to install and your phone connects to local networks in Japan automatically. No SIM-swapping, no roaming contract — the whole setup takes about a minute online before you travel.
How much does an eSIM for Japan cost?
The cheapest plan is 1GB for 7 days at $2.50. SimSIM has 5 plans for Japan.
Which network will I connect to in Japan?
Plans for Japan run on KDDI/au, NTT docomo, Rakuten Mobile, SoftBank.
How long is a Japan eSIM valid?
Japan plans run from 7 to 30 days.
Can I use my regular SIM card and the Japan eSIM at the same time?
Yes. Most modern iPhones and Android phones support Dual SIM — your home number stays active on your physical SIM while the Japan eSIM handles local data. Both lines run simultaneously, so you never miss calls or messages from home.
Will I keep my current phone number when using a Japan eSIM?
Yes. Installing an eSIM for Japan does not replace or change your existing number. Your physical SIM stays active and your home number remains reachable throughout your trip.
Can I top up my Japan eSIM?
Yes — you can add more data to a Japan plan from the app without installing a new eSIM.
Does the Japan eSIM include calls or SMS?
Japan plans are data-only. Use WhatsApp, FaceTime or another app for calls.
Nearby destinations
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Why SimSIM?
One clear price
See the full price before you pay. No surprises on your bill.
Online in about a minute
Tap to install before your trip and connect automatically the moment you land.
Your number stays active
Dual SIM keeps your home line active while you browse on the local network.
190+ destinations
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