eSIM Japan: Mobile Data From the Moment You Land

For most countries the usual advice is to scan the QR code at home. Japan is the exception: keep the code until you have landed and add the eSIM there. Buying in advance still makes sense, because the purchase is done in a few minutes before your flight and the QR code waits in your account under My eSIM Plans.

One deadline is shorter than elsewhere. A plan for Japan has to be activated within 90 days of purchase, while most other destinations allow 180 days. If your trip is still months away, buy your travel eSIM for Japan closer to departure. The validity of the plan itself only begins when the eSIM first connects to a supported network in Japan.

Plan a few minutes for this after landing, before you head for the train or the taxi.

Find a Wi-Fi network

Scanning the QR code needs a working internet connection. Use the Wi-Fi at the airport, in a café or at your hotel, and stay connected until the installation has finished.

Scan the QR code a single time

Open the code from your Anosim account and add the eSIM in your phone settings. Each code works only once, so keep the installed profile on your phone and never scan the same code again. If the installation fails, write to our support first.

Turn the eSIM on for data

Switch the new line on, select it for mobile data and allow data roaming on it. Typically the eSIM finds a Japanese network within one to two minutes.

Still no signal?

Restart the phone, toggle airplane mode on and off and set network selection to automatic. That fixes most problems with the first connection.

You can use your eSIM in Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Kobe, Fukuoka, Sapporo and Saitama, and in other cities as well. Checking train connections in Tokyo, looking up temples in Kyoto or finding a restaurant in Osaka: maps and translation apps keep working wherever the network reaches.

Depending on the network operator and your location, the connection runs on 3G, 4G/LTE or 5G. The operator's fair-use rules may slow the speed down after heavy use, so large downloads are better left for the hotel Wi-Fi.

Combining Japan with other stops in Asia? Have a look at eSIM Thailand and eSIM Vietnam.

Hotspot is available on the Japan plans. Turn on personal hotspot in your phone settings, and a laptop, a tablet or a fellow traveller's phone can go online through your eSIM. That helps when you need to send work files from a room without Wi-Fi or when only one person in the group has an eSIM-capable phone.

Every connected device draws from the same data plan, so sharing uses it up faster.

The best eSIM for Japan is the one that suits your phone and your trip. Japan lies outside the EU roaming rules, so a European home tariff can get expensive there. Before you buy a Japan travel eSIM, run through these points:

Your phone supports eSIM and is unlocked

The device has to be eSIM-capable and free of a carrier lock. Some iPhone models sold in mainland China, Hong Kong and Macau have no eSIM at all.

Data covers what you need

Anosim sells a prepaid eSIM in Japan as a data plan without a phone number. Messengers, internet calls such as WhatsApp calls, streaming and photo uploads all run over data.

Your home number stays reachable

Your regular SIM remains in the phone, so friends can still reach your usual WhatsApp number while the Japan eSIM handles the data.

No ID check, no contract

Buying the eSIM does not require an ID. You pay from your Anosim balance, which you top up with cryptocurrency or a bank transfer.

The eSIM brings data but no number, so verification codes cannot arrive on it. If a booking site, a local app or a service asks for an SMS code during your stay, pair the eSIM with an Anosim number:

- Activation for one code, for example a one-time sign-up.
- Rent Service if the same service is likely to ask you to verify again.
- Rent Number for a number you can use with any service.

If a number is virtual, it is labelled as such in the provider selection. All other destinations and the order form are on the eSIM page.