eSIM, SIM Card or Pocket Wi-Fi for Japan (2026): How to Choose

Short answer: if your phone supports eSIM and isn't locked to your home carrier, a data-only eSIM is the simplest choice for most trips. You install it before you fly and you're online when you land. Choose pocket Wi-Fi if your phone is locked or doesn't take an eSIM, or if a group wants to share one connection with laptops. You only need a voice SIM with a Japanese number in specific cases, and most visitors don't.

All prices below were checked on the providers' own pages on 10 November 2026. They change often, and some sites show different prices depending on the currency you pick.

Step 1: Will an eSIM work on your phone?

Check this before anything else, because a SIM or eSIM only works on a phone that is not locked to your carrier.

iPhone

• Supported models: iPhone XS, XS Max, XR or later support eSIM.
• Check the lock: go to Settings > General > About and look at Carrier Lock. If it says "No SIM restrictions", you're fine. If it doesn't, ask your carrier about unlocking it before you travel.
• Installing: your iPhone must be on Wi-Fi when you install an eSIM.
• Phones with no SIM tray: iPhone 14, 15 and 16 models bought in the US have no physical SIM slot. Neither do iPhone 17-series and iPhone 18 Pro models bought in the US, Canada, Mexico, Japan and some other countries, or any iPhone Air or iPhone Duo. With these phones, a physical SIM card is not an option. Choose an eSIM or pocket Wi-Fi.

Google Pixel

• Supported models: Pixel 4 and later support eSIM. Google notes that an eSIM needs an EID, which you'll find under Settings > About phone > SIM status.
• Locked phones: Pixels bought from a carrier can be SIM-locked for up to two years. Pixels from the Google Store are sold unlocked.

Other Android phones: check your phone maker's help pages for "eSIM" and "SIM lock".

Step 2: Pick the type of connection

How much does mobile data cost in Japan?

Data-only eSIMs

US dollar prices were shown in USD on each provider's site. Airalo shows a separate yen price list (for example ¥4,350 for 7 days unlimited), so don't simply convert.

Physical data SIM cards

Pocket Wi-Fi

Japan Wireless rents an unlimited pocket Wi-Fi on SoftBank 4G from US$4.70 a day. It connects up to 8 devices. You can pick it up at Narita, Haneda, Kansai, Chubu, Fukuoka or New Chitose airports or have it sent to your hotel, but not to an Airbnb. You return it in any post box with the prepaid envelope.

Voice plans with a Japanese number

• Mobal voice SIM or eSIM: ¥4,950 up front, plus a monthly fee from ¥1,650 for 1GB. It runs on docomo with a Japanese 070/080/090 number. Incoming calls and texts are free. There's no minimum term and no cancellation fee. You need your original passport (not a copy) and must be 18 or older. The voice eSIM can't be sent by email, so it's posted or collected in Japan.
• Sakura Mobile voice + data eSIM: for example ¥12,155 for 10 days or ¥14,575 for 14 days, including tax and domestic call minutes (120 minutes for stays up to 10 days, 240 minutes for 11–30 days). It requires an in-person passport check at Narita, Haneda, Kansai or Fukuoka airport, or at the Shinjuku office.

When does the plan start?

This matters if you install before you fly.

• Ubigi starts automatically when you arrive in Japan, and expires if you don't start it within 6 months of buying.
• Holafly starts as soon as it connects to a supported network.
• Sakura Mobile's 3GB-per-day eSIM starts on the day you install it, so install it close to arrival. Its unlimited eSIM starts when your phone first connects in Japan.
• Airalo says you can install the eSIM whenever you like before your trip.

Can I share data with friends or a laptop?

"Unlimited" usually doesn't mean unlimited hotspot sharing.

• Holafly: unlimited data on your phone, but sharing with other devices is capped at 1GB per day. Under its fair-use policy, speeds may also be reduced for up to a day.
• Sakura Mobile: tethering is allowed on all plans. The unlimited eSIM has a tethering cap that grows with the length of the plan, from 1GB to 30GB.
• Mobal: its 16-day unlimited eSIM allows up to 15GB of hotspot use.
• Airalo: hotspot works if your phone and the network support it. We couldn't confirm a cap.
• Ubigi: says "data sharing allowed".
• Pocket Wi-Fi is built for sharing. Japan Wireless connects up to 8 devices.

What about refunds?

• Holafly: you have up to 6 months to request a refund. If your phone turns out to be incompatible or locked, the conditions are that you haven't scanned the QR code and haven't used any data. Refunds for connection problems carry a US$3.50 administrative fee.
• Sakura Mobile: you can cancel and get a refund at any time before the eSIM QR code has been shown to you.
• Airalo: expired or fully used eSIMs aren't refundable. Refunds made in the app are paid as Airalo credit (Airmoney), not cash.

Do I need a Japanese phone number?

Most short-stay visitors don't.

• Taxis: the GO taxi app's page for visitors asks for a phone number and a verification code, and accepts non-Japanese numbers.
• Emergencies: the police number is 110, and fire and ambulance is 119.
• Help in English: the Japan Visitor Hotline runs 24 hours a day in English, Chinese and Korean. Call 050-3816-2787, or +81-50-3816-2787 from outside Japan.

A data-only eSIM won't give you a Japanese number. If you need one, choose one of the voice plans above.

Is free Wi-Fi enough on its own?

It's a useful backup, but we wouldn't rely on it alone.

• Airports and chains: Japan's major international airports have free Wi-Fi, and so do some coffee shops, fast-food chains and convenience stores. You often need to register first.
• SoftBank's FREE Wi-Fi PASSPORT: free for 14 days from registration. You register by voice call or email, and the voice-call option needs roaming switched on.
• The "Japan.Free Wi-Fi" sign: look for this mark at places that offer free Wi-Fi.

Buying after you arrive

Forgot to sort it out before you flew? IIJ sells a data-only eSIM at MINISTOP convenience stores. You buy it at the store's Loppi kiosk, and it's valid for 30 days on docomo. At launch it cost from ¥2,480 for 3GB, as announced in September 2025. You'll need Wi-Fi and an email address to install it. IIJ also sells an unlimited data SIM on au for 10, 15 or 31 days at Bic Camera, Kojima and Sofmap stores.

Mobal notes known connection issues with Google Pixel 7 and later phones, so Pixel users should check the provider's notes before buying.

Checklist

• Phone unlocked ("No SIM restrictions" on iPhone) and eSIM-capable
• Know whether your phone has a SIM tray (most recent US iPhones don't)
• Choose by trip length, data needs and whether you'll share
• Install the eSIM on Wi-Fi, and know when its days start counting
• Set the travel eSIM as your data line to avoid roaming at home
• Carry your passport if you'll buy a SIM in Japan or need a voice plan