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.
Eight providers from the existing guide. Open the official page for the plan that matches your dates.
| Provider | Plan example | Check before buying | Official site |
|---|---|---|---|
| SailyeSIM / SIM | US$10.995 GB · 30 days | Daily speed allowance on unlimited | View plans ↗ |
| AiraloeSIM / SIM | US$26.50Unlimited · 7 days | Read the selected package’s terms | View plans ↗ |
| HolaflyeSIM / SIM | US$27.50Unlimited · 7 days | Hotspot: 1 GB/day; fair-use rules | View plans ↗ |
| UbigieSIM / SIM | Check current priceJapan data plans | Current price not confirmed | View plans ↗ |
| Sakura MobileeSIM / SIM | Check current priceJapan travel eSIM | Network and daily limits vary by plan | View plans ↗ |
| MobaleSIM / SIM | Check current priceData / Japanese-number SIM | Phone number requires the right product | View plans ↗ |
| NINJA WiFiPocket Wi-Fi | Check current pricePocket Wi-Fi rental | Collection, return and total rental cost | View plans ↗ |
| Japan WirelessPocket Wi-Fi | Check current pricePocket Wi-Fi rental | Delivery timing and return arrangements | View plans ↗ |
Know what you’re buying.
Data amount is only one part of the decision.
Saily
eSIM / SIMFixed-data and unlimited plans. The 10 GB / 30-day option is US$17.99. Unlimited includes 5 GB/day at full speed, then up to 1 Mbps; hotspot sharing is supported.
Official plans & conditions ↗Airalo
eSIM / SIMJapan plans now include unlimited options as well as fixed-data choices. The official page lists a 7-day unlimited plan at US$26.50 and 15 days at US$48. Check the selected package’s speed and hotspot terms.
Official plans & conditions ↗Holafly
eSIM / SIMDay-based unlimited data: 7 days US$27.50, 15 days US$50.50. Japan hotspot sharing is limited to 1 GB/day. Network fair-use controls may temporarily reduce speed.
Official plans & conditions ↗Ubigi
eSIM / SIMCompare the current Japan plans in Ubigi’s catalogue. Confirm the data allowance, validity period, activation policy and network shown for the chosen plan.
Official plans & conditions ↗Sakura Mobile
eSIM / SIMA Japan-based provider with day-based eSIM options. Its docomo 5G product lists up to 3 GB/day of high-speed data and supports hotspot. Conditions vary by product.
Official plans & conditions ↗Mobal
eSIM / SIMOffers data products and plans with a Japanese phone number. Choose the appropriate voice/SMS product and check identity, activation, delivery and payment requirements.
Official plans & conditions ↗NINJA WiFi
Pocket Wi-FiCompare rental plans and collection/return locations. Check your flight’s airport and counter hours, plus high-speed allowance, insurance and total rental charges.
Official plans & conditions ↗Japan Wireless
Pocket Wi-FiPocket Wi-Fi options with collection and delivery arrangements in Japan. Confirm your chosen location, advance-order deadline, return instructions and full trip price.
Official plans & conditions ↗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.
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.
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