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 | 3 GB high speed, then 200 kbps; tax includedPrice recorded: | See plans ↗ |
| MobaleSIM / SIM | JPY2,340Data-only tourist eSIM · 3 GB · 8 days | Data-only eSIM; no Japanese phone numberPrice recorded: | See plans ↗ |
| SimbyeeSIM / SIM | €2.441 GB · 7 days · before advertised discount | Regular listed price; no discount appliedPrice recorded: | See plans ↗ |
| NINJA WiFiPocket Wi-Fi | JPY440 / day4G · 1 GB/day · 1 router | After 1 GB/day: 128 kbps; tax includedPrice recorded: | See plans ↗ |
| Japan WirelessPocket Wi-Fi | JPY3,751 / dayUnlimited · 1-day rental | 1-day quote; delivery +JPY500/orderPrice recorded: | See plans ↗ |
| SAMURAI WiFi (BS-Mobile)Pocket Wi-Fi | THB180 / day4G unlimited · Thailand pickup | Regular 4G rate; Thailand pickup/returnPrice 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 / SIMEntry tourist data eSIM: 3 GB for 8 days, JPY2,340 including tax. Japanese-number voice/SMS plans are separate products with their own fees.
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 ↗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-FiFor Thailand → Japan trips: collect and return in Thailand, with Thai airport counters and Bangkok delivery options. Thai-language support and baht pricing make advance arrangements convenient. Share the connection with your travel group.
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 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.
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