Japan tourist SIM or eSIM: which to pick
In Japan you can buy a tourist data SIM at the airport, in electronics stores and sometimes from vending machines. You can also land with a travel eSIM already installed. Both give you data on Japanese networks. The differences are in when you get connected, what you have to show, whether you keep your own number, and whether you need a Japanese phone number at all.
The short version
| Travel eSIM | Tourist physical SIM bought in Japan | |
|---|---|---|
| When you're online | As the plane lands | After you find a counter or store |
| What you show | Nothing; you pay online | Varies; some sellers ask to see your passport |
| Your home number | Stays active on the home line | Removed from the phone while the tourist SIM is in |
| Japanese phone number | No, data-only | Usually no on data SIMs; voice SIMs are less common |
| Phone requirement | Unlocked, eSIM-capable | Unlocked, with a physical SIM slot |
Arrival: counters and queues
The main cost of a tourist SIM is time at the exact moment you want to be moving. After immigration and customs you look for a counter, compare a few options, pay, then swap the SIM in the arrivals hall. At busy arrival times that can mean a queue. If your flight lands late at night, check that the counter you're counting on will be open.
With an eSIM you install at home on Wi-Fi, and the plan's validity starts when the phone first connects in Japan. You can check the train to the city, message your hotel and open a ride-hail or taxi app as soon as you're off the plane. The Tokyo and Osaka city guides cover the airport links.
Passports and paperwork
Japan has identity rules for phone lines, and they are stricter for lines with a voice number. Data-only tourist SIMs are generally simpler, but sellers handle this differently, so carry your passport if you plan to buy one. A travel eSIM is bought online with Apple Pay, Google Pay or card. There is no form, and the account is created from the payment.
Do you need a Japanese phone number?
This is the question that decides it for some travellers. Our Japan plans are data-only, as are most tourist SIMs. Think about what you'd use a local number for:
- Restaurant bookings. Some booking forms ask for a Japanese number. Your hotel's front desk can often book for you, and many booking sites accept international numbers.
- Calling a taxi or a shop. Ride-hail and taxi apps work over data. For a quick call, an app call over data or your home line works.
- SMS verification for local apps. Some Japanese services verify with a domestic number. If a specific service matters to you, check its sign-up rules before you fly.
If you really need a Japanese voice number, a voice SIM from a provider that sells to visitors is the route. Expect identity checks, and check the provider's terms in advance. For most trips, data plus your own number is enough.
Keeping your own number
A tourist SIM takes your home SIM's place in the tray, so your number goes offline. That matters because your bank and many apps send codes by SMS. With an eSIM, the home line stays in the phone. Set the eSIM as the data line, turn Data Roaming off for the home line, and SMS codes still arrive while your carrier doesn't bill you for data. Calls and SMS you send from the home line are priced by your carrier, so check its rates.
Pocket Wi-Fi, the third option
Pocket Wi-Fi routers are popular in Japan, especially for groups. One device can serve several phones, but it needs charging, it has to be collected and returned, and everyone has to stay near it. We compare that in detail in eSIM vs pocket Wi-Fi.
How much data for Japan
Size it the same way as any trip: 0.2 GB a day for maps and messaging, 0.5 GB for socials and photos, 1.3 GB for streaming, plus 15% headroom. Ten days of socials is about 5.8 GB. At streaming levels, compare an unlimited plan; see fixed data vs unlimited. Travelling for the blossoms or the snow? See cherry blossom season or a ski trip to Japan. The Japan guide shows the plans for your trip length and the networks they use.
When the tourist SIM still makes sense
- Your phone doesn't support eSIM or isn't carrier-unlocked. Check on the devices page. (The reverse also applies: US iPhones from the iPhone 14 onward have no SIM tray, so a tourist physical SIM isn't an option; see eSIM-only iPhones.)
- You specifically need a local voice number and have confirmed you can get one.
- You're staying long enough to sign a resident contract, which is a different decision. Our general eSIM vs local SIM post covers long stays.
Otherwise, install before you fly and land connected. See current plans and prices on the Japan page.
Questions
Does the Japan eSIM come with a Japanese phone number?
No. Our Japan plans are data-only. You keep your own number on your home line, and apps such as WhatsApp and LINE work over the data.
Do I need to show my passport for a travel eSIM?
No. You pay with Apple Pay, Google Pay or card and install from the link or QR code. No counter is involved.
Can I get a Japanese voice number as a tourist?
Sometimes, but it is less common than a data SIM and usually involves identity checks. If you truly need a local number, check the provider's requirements before you fly.
When should I install the Japan eSIM?
At home on Wi-Fi, before you leave. The plan's validity starts when the phone first connects to a network in Japan, so you land connected.