Japan eSIM Unlimited Data | KDDI
True Unlimited Data
4G/5G Speed
Up to 31 Days
Data Only
Service end 180th Day
Use in Japan
Japan eSIM Unlimited Data | KDDI
Supported Countries
- 🇯🇵 Japan
Description
What’s Included?
- True Unlimited Data
- 4G/5G speed (up to 1Gbps)*
- 1 – 31 days of service from activation (natural day)
- For use in Japan
- Hotspot/Tethering enabled
- Limits apply (D-1): e.g. 4 days – 3GB, 7 days – 6GB, 10 days – 9GB, 15 days – 15GB, 31 days – 30GB
- How do eSIMs work? Check our eSIM setup guide
- Purchase your eSIM plan, QR code will be sent instantly
- Scan the QR code to add the eSIM to your eSIM compatible phone
- eSIM must connect to supported network and data service ends on 180th day of purchase (inclusive of data usage)
- Get a free Ice Fruit frozen snack in Japan with your KDDI eSIM
- Redeem by 31 January 2026
- Limited time only, while stocks last.
- Voucher will be sent on a seperate email
Thing’s to know
- The eSIM’s provider is KDDI (local Japanese operator)
- Plan starts when eSIM connects to supported network
- No ID registration needed
- Service days are calculated according to Japan Standard Time (GMT+9) and reset at 00:00 (midnight) each day, not based on a 24-hour period.
- No calls or texts included (data-only eSIM)
- Coverage on KDDI
- Compatible with unlocked eSIM-enabled phones (with EID numbers)
Important Notes
- Adding the eSIM outside the coverage country may result in a “failed activation,” which is normal. The eSIM will activate once you reach your destination.
- Once the eSIM is installed it cannot be transferred or deleted – no refunds will be provided for installation error or accidental delete
- eSIM service will end on 180th day of purchase (including data usage). Please ensure you purchase carefully, as no refunds can be issued once the eSIM has been delivered.
- Haven’t received your eSIM? Check your junk mail or reach out to us
- Check network coverage in your intended travel areas; Coverage issues are outside our control and we do not offer refunds
Japan eSIM Unlimited Data by KDDI
- At TravelKon, we believe in clear and honest communication. Some sellers advertise ‘unlimited data‘ loosely. If you encounter ambiguous language about potential data slowdowns due to factors beyond their control and assurances that speeds will normalise the next day, it indicates undisclosed daily usage caps. Reducing the speed to 128Kbps without disclosure is misleading and barely enough for basic messaging!
- Our Unlimited Japan KDDI Ultra plan truly means unlimited data with no daily data caps!
- Ranked #1 by Opensignal in October 2024, KDDI leads Japan’s telecom market, surpassing NTT Docomo and Softbank. Known for its extensive coverage in both urban and rural areas, KDDI offers unmatched network performance, ensuring seamless connectivity across Japan’s diverse landscapes.
Troubleshooting Guide
eSIM not working? Don’t stress! Follow this guide to get you up and running.
- Disable VPN and any secondary SIM/eSIM lines (for dual SIM phones)
- Connect to Wi-Fi and disable airplane mode before scanning the eSIM
- Confirm mobile data is sourced from our eSIM (i.e. the correct eSIM profile is selected)
- Turn data roaming on (Android: select all network)
- Wait up to 10 minutes for activation to occur
- APN: uad5gn.au-net.ne.jp | Username: au@uad5gn.au-net.ne.jp | Password: au OR:
APN: uno.au-net.ne.jp | Username: 685840734641020@uno.au-net.ne.jp | Password: KpyrR6BP (Android: select manually)
Android Only: Authentication Type: CHAP - Turn off automatic network selection and manually choose from the list below.
- Restart your phone and/or turn on and off airplane mode
- Still not working? Chat with us live, we’re here to help!
We are not affiliated with the network provider. Data allowance may change without notice; check our website for updates.
Network Operator(s) List
- Japan [KDDI]
*Access to KDDI’s 5G network is available in designated 5G coverage areas when using a 5G-compatible device. Outside these areas, your device will switch to 4G. Download speeds on 5G can reach up to 1Gbps under optimal conditions, this is the maximum potential speed and not guaranteed. Speeds and quality depend on factors like location, device, network congestion, and coverage.
List of eSIM Supported Handsets (not exhaustive)
Reviews
Customer Reviews
Great service with no issues or black spots at all within Japan.
Wed Nov 26 2025 00:22:47 GMT+0000 (Coordinated Universal Time)
Just turn on and
Just turn on and go
Fri Oct 10 2025 22:38:43 GMT+0000 (Coordinated Universal Time)
Holiday in Japan
Its absolutely a good desision that i purchased an esim at travelkon its hassle free as soon i arrived in Japan it activate straight away. I’ll used it again in my next asia adventure. Thanks
Sat Apr 05 2025 09:19:48 GMT+0000 (Coordinated Universal Time)
Great service and speed with no connectivity issues (in Tokyo, Nagano and Hakuba)
Thu Feb 01 2024 08:35:18 GMT+0000 (Coordinated Universal Time)
Working well as soon as I landed. Thanks!
Tue Jun 11 2024 22:38:02 GMT+0000 (Coordinated Universal Time)
Best travel sim and great support if you encounter any issues
Wed Jun 07 2023 04:53:50 GMT+0000 (Coordinated Universal Time)
Great value and easy to use when travelling overseas!!!
Fri Jun 30 2023 07:19:46 GMT+0000 (Coordinated Universal Time)
We have used TravelKon a few times now for or Japan trips. When they have a sale it's a good price for their True Unlimited data plan. Last was for 17 days and no issue with activation nor with coverage (we were in big cities as well as out in the country side) Speeds were great too. . Great service.
Fri Dec 05 2025 02:14:22 GMT+0000 (Coordinated Universal Time)
Great service and coms. Honest service. Replaced my lost Sim quickly
Tue Dec 02 2025 08:17:09 GMT+0000 (Coordinated Universal Time)
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- 🇧🇾 Belarus
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- 🏳️ Bonaire
- 🇧🇦 Bosnia
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- 🇧🇬 Bulgaria
- 🇧🇫 Burkina Faso
- 🇨🇲 Cameroon
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- 🇨🇫 Central African Republic
- 🇹🇩 Chad
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- 🇨🇳 China
- 🇨🇴 Colombia
- 🇨🇬 Congo Republic
- 🇨🇷 Costa Rica
- 🇨🇮 Cote dIvoire
- 🇭🇷 Croatia
- 🇨🇺 Cuba
- 🏳️ Curacao
- 🇨🇾 Cyprus
- 🇨🇿 Czech Republic
- 🇩🇰 Denmark
- 🇩🇴 Dominican Republic
- 🇨🇩 DR Congo
- 🇪🇨 Ecuador
- 🇪🇬 Egypt
- 🇸🇻 El Salvador
- 🇬🇶 Equatorial Guinea
- 🇪🇪 Estonia
- 🇪🇹 Ethiopia
- 🇫🇴 Faroe Islands
- 🇫🇯 Fiji
- 🇫🇮 Finland
- 🇫🇷 France
- 🇵🇫 French Polynesia
- 🇬🇦 Gabon
- 🇬🇪 Georgia
- 🇩🇪 Germany
- 🇬🇭 Ghana
- 🇬🇮 Gibraltar
- 🇬🇷 Greece
- 🇬🇱 Greenland
- 🇬🇩 Grenada
- 🇬🇵 Guadeloupe
- 🇬🇹 Guatemala
- 🇬🇬 Guernsey
- 🇬🇳 Guinea
- 🇬🇼 Guinea-Bissau
- 🇬🇾 Guyana
- 🇧🇦 Herzegovina
- 🇭🇳 Honduras
- 🇭🇰 Hong Kong
- 🇭🇺 Hungary
- 🇮🇸 Iceland
- 🇮🇳 India
- 🇮🇩 Indonesia
- 🇮🇶 Iraq
- 🇮🇪 Ireland
- 🇮🇲 Isle of Man
- 🇮🇱 Israel
- 🇮🇹 Italy
- 🇯🇲 Jamaica
- 🇯🇵 Japan
- 🏳️ Jersey
- 🇯🇴 Jordan
- 🇰🇿 Kazakhstan
- 🇰🇪 Kenya
- 🇽🇰 Kosovo
- 🇰🇼 Kuwait
- 🇱🇦 Laos
- 🇱🇻 Latvia
- 🇱🇸 Lesotho
- 🇱🇷 Liberia
- 🇱🇮 Liechtenstein
- 🇱🇹 Lithuania
- 🇱🇺 Luxembourg
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- 🇲🇾 Malaysia
- 🇲🇱 Mali
- 🇲🇹 Malta
- 🇲🇶 Martinique
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- 🇲🇽 Mexico
- 🇲🇩 Moldova
- 🇲🇳 Mongolia
- 🇲🇪 Montenegro
- 🇲🇦 Morocco
- 🇲🇿 Mozambique
- 🇳🇵 Nepal
- 🇳🇱 Netherlands
- 🇳🇨 New Caledonia
- 🇳🇿 New Zealand
- 🇳🇮 Nicaragua
- 🇳🇪 Niger
- 🇳🇬 Nigeria
- 🏳️ North Cyprus
- 🇲🇰 North Macedonia
- 🇳🇴 Norway
- 🇴🇲 Oman
- 🇵🇰 Pakistan
- 🏳️ Palestine
- 🇵🇦 Panama
- 🇵🇬 Papua New Guinea
- 🇵🇾 Paraguay
- 🇵🇪 Peru
- 🇵🇭 Philippines
- 🇵🇱 Poland
- 🇵🇹 Portugal
- 🇵🇷 Puerto Rico
- 🇶🇦 Qatar
- 🇷🇪 Reunion
- 🇷🇴 Romania
- 🇷🇺 Russia
- 🇷🇼 Rwanda
- 🏳️ Saba
- 🇰🇳 Saint Kitts and Nevis
- 🇱🇨 Saint Lucia
- 🏳️ Saint Vincent and Grenadines
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- 🇸🇦 Saudi Arabia
- 🇸🇳 Senegal
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- 🇰🇷 South Korea
- 🇪🇸 Spain
- 🇱🇰 Sri Lanka
- 🇸🇷 Suriname
- 🇸🇪 Sweden
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Use in Japan
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Supported Countries
- 🇯🇵 Japan
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