One phone. Your own connection.
An eSIM is convenient when your exact device supports it and is unlocked. Compare data allowance, validity and activation rules.
Compare eSIMs ↗THE JAPAN CONNECTION GUIDE
Less time connecting.
More time exploring.
Maps, train times, translations. Get your internet ready for Japan with a clear guide to eSIMs, pocket Wi-Fi and local SIMs.
YOUR JAPAN TRIPJP / 2026
eSIM + Wi-Fi
One less thing to think about.
01 / Choose your connection
Start with how you travel.
Your phone and your itinerary matter more than a single ‘best’ brand.
One group. A shared connection.
Pocket Wi-Fi can connect several devices. Everyone must stay near the router; allow for charging, collection and return.
Compare pocket Wi-Fi ↗A Japanese phone number.
Choose a voice-capable SIM plan if you need local calls or SMS. Check identity requirements and supported devices.
See phone-number options ↗02 / Compare providers
The options, side by side.
The lowest regular entry price for each listed Japan service, with its data and duration.
| Provider | Lowest regular entry price | Included / limits | Official site |
|---|---|---|---|
| SailyeSIM / SIM | US$3.991 GB · 7 days | Data-only entry plan; hotspot supportedPrice recorded: | See plans ↗ |
| AiraloeSIM / SIM | US$4.001 GB · 3 days | Data-only · 3-day validityPrice recorded: | See plans ↗ |
| HolaflyeSIM / SIM | US$3.90Unlimited · 1 day | Hotspot 1 GB/day; fair-use speed controlsPrice recorded: | See plans ↗ |
| UbigieSIM / SIM | US$2.00Asia incl. Japan · 500 MB · 1 day | 500 MB total; Japan included in Asia coveragePrice recorded: | See plans ↗ |
| Sakura MobileeSIM / SIM | JPY1,3753 GB/day · 1 day · tax included | After 3 GB/day: 200 kbps; fixed-data minimum price unconfirmedPrice recorded: | See plans ↗ |
| MobaleSIM / SIM | JPY1,650Unlimited data · 3 calendar days · tax included | Data-only; hotspot 2 GB total / 3 daysPrice recorded: | See plans ↗ |
| SimbyeeSIM / SIM | €2.441 GB · 7 days · before advertised discount | Regular listed price; no discount appliedPrice recorded: | See plans ↗ |
| eSIM For UeSIM / SIM | US$3.491 day · 2 GB high-speed, then 1 Mbps | 2 GB/day then 1 Mbps; USD price last verified 2026-10-24Price recorded: | See plans ↗ |
| NINJA WiFiPocket Wi-Fi | JPY440 / day4G · 1 GB/day · daily rental unit | After 1 GB/day: 128 kbps; airport pickup/return free; delivery JPY550/wayPrice recorded: | See plans ↗ |
| Japan WirelessPocket Wi-Fi | JPY3,751 / dayUnlimited · 1-day rental | 1-day rental + delivery = JPY4,251 totalPrice recorded: | See plans ↗ |
| SAMURAI WiFi (BS-Mobile)Pocket Wi-Fi | THB180 / day4G unlimited · 1-day rental · Thailand pickup | Normal 4G rate; airport return fee unconfirmed; parcel THB60 below THB800Price recorded: | See plans ↗ |
Know what you’re buying.
Data amount is only one part of the decision.
Saily
eSIM / SIMEntry plan: 1 GB for 7 days. Hotspot supported. Unlimited alternatives have 5 GB/day at full speed, then up to 1 Mbps.
Price recorded: See plans & details ↗Airalo
eSIM / SIMMoshi Moshi data-only entry plan: 1 GB for 3 days. Larger fixed-data and unlimited plans are also available.
Price recorded: See plans & details ↗Holafly
eSIM / SIMOne-day unlimited data eSIM. Hotspot sharing is limited to 1 GB/day; network fair-use controls may temporarily reduce speeds.
Price recorded: See plans & details ↗Ubigi
eSIM / SIMThe lowest entry bundle covering Japan is the Asia plan: 500 MB for 1 day. Data-only, hotspot supported. Japan-only plans are also available.
Price recorded: See plans & details ↗Sakura Mobile
eSIM / SIMLowest travel eSIM: one day, with 3 GB at high speed on docomo; then 200 kbps. JPY1,375 includes tax. Data-only; hotspot supported.
Price recorded: See plans & details ↗Mobal
eSIM / SIMLowest tourist data eSIM: unlimited data on KDDI for 3 calendar days, JPY1,650 including tax. Hotspot: 2 GB total for the 3 days. First connection in Japan counts as day 1; digital delivery is free. No phone number, calls or SMS. Japanese-number products are separate.
Price recorded: See plans & details ↗Simbye
eSIM / SIMData-only Japan eSIM with QR setup and hotspot support. Validity starts on first connection in Japan. Unlimited plans: 2 GB/day at high speed, then 1 Mbps. Available networks vary by plan; check the selected package.
Price recorded: See plans & details ↗eSIM For U
eSIM / SIMJapan data eSIM operated by L&L Synergy FlexCo in Austria. The listed one-day plan provides 2 GB at high speed, then 1 Mbps. Validity starts on first connection; network and internet routing vary by plan. Under its terms, installation is one-time and change-of-mind refunds are unavailable after installation.
Price recorded: See plans & details ↗NINJA WiFi
Pocket Wi-FiLowest 4G router plan: JPY440/day including tax, with 1 GB/day at high speed; then 128 kbps. One router can be shared. Delivery and optional insurance are separate.
Price recorded: See plans & details ↗Japan Wireless
Pocket Wi-FiUnlimited Pocket Wi-Fi. One-day regular rental: JPY3,751, plus JPY500 delivery per order in the official quote. Longer rentals have different daily rates.
Price recorded: See plans & details ↗SAMURAI WiFi (BS-Mobile)
Pocket Wi-FiThailand → Japan service with Thai-language support; pickup/return in Thailand. Normal 4G rate THB180/day (promotion THB150); 5G THB280/day. Billing includes Thai departure and return days; the calculator allows a one-day rental. Airport return fees remain unconfirmed. Suvarnabhumi and Don Mueang counters: 24h; Chiang Mai and Phuket: 06:00–23:59; Ruamrudee office: 09:00–18:00 (Thai time). Parcel delivery: THB60 below THB800, free from THB800; dispatched 3 days ahead. Return courier is arranged by the customer. Fair-use restrictions may apply.
Price recorded: See plans & details ↗03 / Set up
Get ready before you fly.
Installation and activation are different. Follow your particular provider’s instructions.
Check your device
Confirm the exact model and country variant supports eSIM, and that your phone is unlocked. A model name alone is not enough.
Buy and install with Wi-Fi
Save the installation instructions and support details. Check when the validity period starts before activating your plan.
Choose the travel line for data
On arrival, select the travel SIM for mobile data and enable roaming if the provider requires it. Disable data roaming on your home line and automatic data switching.
Test before leaving the airport
Turn off Wi-Fi and try maps or messaging. If it fails, check the provider’s APN and activation instructions and contact support.
04 / FAQ
A few things worth knowing.
Does ‘unlimited’ mean full speed all day?
Not necessarily. Providers may set daily high-speed allowances or apply fair-use controls. Hotspot sharing can have a separate limit. Read the specific plan terms.
Will a travel eSIM give me a Japanese number?
Many travel plans provide data only. App calls work over data, but ordinary calls and SMS need a suitable voice plan. Mobal / Sakura Mobile offers Japanese-number plans; check the selected product.
Can I keep my home number?
If your device supports the required simultaneous SIM setup, you can keep your home line active. Your home carrier may charge for calls or messages abroad; check its terms.
How much data should I buy?
Use your phone’s recent data history as a starting point. Maps and messaging generally use less than video streaming. Download offline maps and compare top-up options before buying.
What about rural coverage?
Check the named network and its coverage for your actual route. Mountains, tunnels and remote areas can have weak service on any network. Save important information offline.
About this guide
Operated by Asia Dynamic Communications Co., Ltd. The guide brings together official plan information to help visitors choose internet access for Japan. It does not claim independent speed testing or guaranteed coverage.
Affiliate disclosure
Some links on wifi-japan.net may earn us a commission. Always compare the provider’s current price and terms. Purchases and support are handled by the provider.
Privacy
We use Google Analytics 4 and cookies to understand page visits and improve this guide. Google signals and advertising personalization are disabled in our tag. There is no contact form. Hosting may process access logs; external provider sites have their own privacy policies. How Google uses data
Contact: wifi@wifi-japan.net