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Japan Unlimited eSIM

4.9| 502 Reviews4.88 out of 5 stars based on 502 reviews
KDDI (au)5G/4G
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Important Information

IMPORTANT: Competitors advertising "Unlimited Data for Japan" without addressing any limits or throttling may be misleading. If you find ambiguous language regarding potential data slowdowns attributed to factors beyond their control and assurance speeds will normalize the next day, it typically indicates the presence of an undisclosed daily usage caps. We strongly advise reaching out to them directly or thoroughly reviewing their website to clarify these restrictions. Our Unlimited Japan Data eSIM has No daily data caps and is purely unlimited. Hotspot/tethering limit varies by plan: 4 days (3GB); 7 days(6GB); 10 days(9GB); 15 days (15GB); 31 days (30GB)

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Ensure your device supports eSIM before buying.

AUD$67.00
16% OFF
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Recent Reviews

Nathan W.

Travelled to Japan in April

Travelled to Japan in April 2026 and had SimCorner ready to activate when we land din Tokyo day 1. It didn't let us down for the whole time we were holidaying in Japan. Would use again.

Andrew B.

Easy to buy, cheap prices,

Easy to buy, cheap prices, easy to install, does what it says on the tin. Worked as advertised. Would shop again. Raised one question via their support portal, response was instantaneous and satisfactory.

Belinda C.

I always choose to use

I always choose to use Simcorner when traveling and it is always a very easy service to use. Great options available, easy set up and great coverage!

Michael S.

Internet quality is good. Automatic

Internet quality is good. Automatic connection as soon you arrive in Japan

Compare & Choose the Best eSIM Japan Plan!

[eSIM] Japan Unlimited Data (no daily limit) | KDDI   

Travel hassle-free in Japan with our Unlimited Data eSIM for 4 - 31 Days. Best of all, it is truly unlimited, so no daily limit! Enjoy blazing fast internet upto 1000Mbps download speed for navigation, streaming, and staying connected without worrying about roaming fees or SIM card swaps. Get your KDDI esim Japan Unlimited data today and go explore Japan! 

Included Features Summary:

  • Country Coverage: Japan  
  • Data: Unlimited Data (no daily limit)
  • Data Speed: 4G/5G Data speeds. Max 1000Mbps download
  • Calls: Not included
  • Texts: Not included
  • Phone Number: Not Included
  • Hotspot/Tethering: Varies by plan – 4 days (3GB); 7 days(6GB); 10 days(9GB); 15 days (15GB); 31 days (30GB)
  • Validity: 4 - 31 Days of service from activation

 

  • Device Compatibility: Can be used with unlocked, eSIM-compatible mobile phones. For compatibility details, please see the "Compatibility" section in "Things to know" section
  • When to install: Upon arrival at your destination
  • Activation: Please see "How to activate this SIM card" in the "Things to know" section

 

***Please Note: This Japan eSIM is a Data ONLY eSIM. It does NOT include Calls or SMS. It can be used in compatible Mobiles Phones. Please check compatibility section below to see if your device is eSIM compatible.***

 

IMPORTANT: Competitors advertising "Unlimited Data for Japan" without addressing any limits or throttling may be misleading. If you find ambiguous language regarding potential data slowdowns attributed to factors beyond their control and assurance speeds will normalize the next day, it typically indicates the presence of an undisclosed daily usage caps. We strongly advise reaching out to them directly or thoroughly reviewing their website to clarify these restrictions. Our Unlimited Japan Data eSIM has No daily data caps and is purely unlimited.

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eSIM Japan Reviews & Ratings

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eSIM Japan FAQs: All You Need to Know

Everything you need to know about SimCorner’s SIM and eSIM services for a hassle-free travel. View all FAQ

SimCorner is your trusted global provider of travel eSIM and SIM cards. We offer affordable, hassle-free plans with options for data-only or data with calls and SMS, covering 200+ destinations. Order our prepaid SIM cards online for fast delivery to your doorstep, or choose an eSIM for instant purchase and easy activation. With our unmatched coverage and award-winning customer support, you can explore the world with confidence wherever your travels take you.
Make sure that your device is eSIM compatibility. See our full list of compatible devices. Ensure that you have access to the eSIM email we have provided. You may wish to print this email out so you have a hard-copy of the eSIM.
You can keep track of your Data usage through your phone's data usage function (found in Settings).
Once the eSIM is loaded, you simply need to have both MOBILE DATA and DATA ROAMING functions ENABLED/TURNED ON in your phone to use the service.
This SIM can connect to different network partners in the country
This sim cannot be recharged. Please ensure you purchase the correct duration based on how long your trip is for. Your days of service will start when the eSIM is connected to a network. This will be the day that your service commences.
You are not able to send SMS and make phones calls with this Europe eSIM. We recommend that you use database apps such as Whatsapp, Viber, Skype to send messages to friends and family.
You can stay in touch with your family and friends by sending them messages and calling them via data based apps such as Whatsapp, Viber, Snapchat, Messenger, Skype, iMessage etc. You are also able to add credit to your Viber or Skype account, which will allow you to make local and international phone calls directly to landlines and mobiles.
Yes, you will have access to all your apps, messages, contacts and emails whilst using this esim card. Nothing on your phone is deleted or changed and you can continue to use your phone as per normal. The only change with using this esim card is that you will have a new phone number.
Order your travel eSIM online and let us know your travel date. The eSIM will be emailed to you within 5-10Minutes. When you land at your travel destination, follow the steps noted in the email and your eSIM will be ready to use. Your Days or service will commence.
This is a data only eSIM. It does not come with a phone number.
Yes, you are able to hotspot/tether from your phone to another phone or device. The total hotspot limits vary by plan; they are noted below: 4 days – 3GB 7 days – 6GB 10 days – 9GB 15 days – 15GB 31 days – 30GB
The mobile data APN settings should automatically update when you insert the sim in you phone. If it does not, you need to update the settings as noted in the email provided.
Depends on the eSIM purchased. Your days of service will start when the eSIM is connected to a network. This will be the day that your service commences.
Should you run into any issues with the eSIM whilst overseas then we encourage you to email us immediately at support@simcorner.com and let us know the following information; Your order number or the name that the order is under Which country you are in currently and whether the eSIM connects to any network, if so, which network? Did you receive any SMS after you installed the eSIM. If so, please send us a screenshot of that message. Message us screenshots of any error message you are getting. What phone model you are using? Any other information about the issue, which will assist us in helping you resolve the issue.
You can stay in touch with your family and friends by sending them messages and calling them via data based apps such as Whatsapp, Viber, Snapchat, Messenger, Skype, iMessage etc. You are also able to add credit to your Viber or Skype account, which will allow you to make local and international phone calls directly to landlines and mobiles.
We have a 100% Money Back Guarantee policy, which means that if you have a bad experience with one of our sim card and receive no value from it, we will provide you a refund. However, you MUST contact us whilst you are having the issue, so our team can assist you in resolving your problems. Please do this when you are in WiFi (generally at the airport when you land if not working to begin with) or e-mail us from your accommodations (WiFi) or cafe etc. If you only decide to contact us after you return to let us know the sim didn't work then we can't look to provide a refund as we won't be able to see exactly what the issue was and why it didn't work. Should you run into any issues whilst using the sim card, please immediately contact us at support@simcorner.com Should our team be unable to assist you in resolving your issue, then we will provide you a refund on your purchase.