Japan eSIM Unlimited Data | KDDI

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True Unlimited Data
4G/5G Speed
Up to 31 Days
Data Only
See use by dates
Use in Japan

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Quantity

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 be used by: 
    • 7 Days eSIM service ends on 10 February 2026
    • All other days 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.

  1. Disable VPN and any secondary SIM/eSIM lines (for dual SIM phones)
  2. Connect to Wi-Fi and disable airplane mode before scanning the eSIM
  3. Confirm mobile data is sourced from our eSIM (i.e. the correct eSIM profile is selected)
  4. Turn data roaming on (Android: select all network)
  5. Wait up to 10 minutes for activation to occur
  6. 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
  7. Turn off automatic network selection and manually choose from the list below.
  8. Restart your phone and/or turn on and off airplane mode
  9. 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

China 5G eSIM
Michael
Rating: 5/5
eSIM worked very well
Thu Oct 30 2025 03:56:32 GMT+0000 (Coordinated Universal Time)
asia esim unlimited 13 countries
Wawan S.
Rating: 5/5
Cheap & reasonable data speed
Cheap & reasonable data speed, highly recommended
Wed Oct 29 2025 01:36:41 GMT+0000 (Coordinated Universal Time)
asia esim 13 countries
Teck N.
Rating: 5/5
Travelkon e-SIM -Easy installation and reliable
Reliable and easy to install.
Wed Oct 29 2025 00:49:18 GMT+0000 (Coordinated Universal Time)
southeast asia esim 7 countries
Wilson T.
Rating: 5/5
Great sim
Great sim. Connected straight awayupon arrival
Mon Oct 27 2025 22:03:40 GMT+0000 (Coordinated Universal Time)
asia esim 13 countries
Yung
Rating: 5/5
Highly recommended
Highly recommended. Working extremely well in every country.
Mon Oct 27 2025 20:12:14 GMT+0000 (Coordinated Universal Time)
china sim card
David C.
Rating: 5/5
China trip
China Sim works perfectly all apps working google translate , whatsup , google maps, thanks sooo much
Mon Oct 27 2025 06:46:09 GMT+0000 (Coordinated Universal Time)
china esim
LK
Rating: 5/5
Great product
Esim and sim card worked well and the VPN was automatic which is a bonus. Great product!
Mon Oct 27 2025 01:57:50 GMT+0000 (Coordinated Universal Time)
china esim
Irvin T.
Rating: 5/5
Great eSIM
Activated with ease. Excellent and reliable service provider.
Sun Oct 26 2025 08:23:28 GMT+0000 (Coordinated Universal Time)
indonesia esim
SW
Rating: 5/5
Excellent
Excellent and just work
Sun Oct 26 2025 00:11:08 GMT+0000 (Coordinated Universal Time)
japan esim docomo iij
Julie B.
Rating: 5/5
Best money i ever spent with the Japanese esim
Best money i ever spent with the Japanese esim from TravelKon
Fri Oct 24 2025 02:51:12 GMT+0000 (Coordinated Universal Time)

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