Marcus F.
Easy
Easy
Japan Unlimited eSIM
4.9|Based on 505 Reviews4.9 out of 5 stars based on 505 reviews
KDDI (au)5G/4G
!
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)
Japan Unlimited eSIM
4.9|Based on 505 Reviews4.9 out of 5 stars based on 505 reviews
KDDI (au)5G/4G
Ensure your device supports eSIM before buying.
Data
Unlimited Data (No Daily Limits)
Validity
4-31 Days
Data Speed
5G/4G
Calls
Not included (Data-Only)
Phone Number
N/A
Texts
Not included (Data-Only)
Hotspot
Varies by plan 4 days (3GB); 7 days(6GB); 10 days(9GB); 15 days (15GB); 31 days (30GB)
Product Add-on
N/A
USD$16.00
Group trip?
Order for everyone
1
Secure payment guaranteed.
eSIMs are instantly delivered to your email!
Price Drop? Get a Refund
If the price drops within 30 days, we'll refund the difference!
Seen it for less? We'll beat it!
If you find the same SIM for less, we'll beat the price by 5%!
USD$16.00
1
Secure payment guaranteed.
Price Drop? Get a Refund
If the price drops within 30 days, we'll refund the difference!
Seen it for less? We'll beat it!
If you find the same SIM for less, we'll beat the price by 5%!
Recent Reviews
Marcus F.
Easy
Easy
Benyada L.
Good
Good
Patrick F.
Nothing but positive things to
Nothing but positive things to say about SimCorner. The installation process was quick and simple and the data was healthy and consistent throughout my trip in Japan. Highly recommend.
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.
[eSIM] Japan Unlimited Data (4 - 31 Days | 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 up to 1000 Mbps download speed for navigation, streaming, and staying connected without worrying about roaming fees or SIM card swaps. Get your KDDI Japan Unlimited Data eSIM today and go explore Japan!
What Is eSIM Technology?
Embedded SIM, or eSIM, technology is revolutionizing mobile connectivity by making a physical SIM card unnecessary when traveling. Travelers can easily activate mobile plans from their devices, streamlining setup and providing greater security and flexibility.
Benefits of the Japan Unlimited Data eSIM for Travel
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High-Speed, Unlimited Data: Enjoy no throttling or daily caps. Use all the data you need.
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Top-Tier Network Access: Use KDDI, an extremely reliable network in Japan, to connect while enjoying 4G LTE speed consistently.
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Immediate Activation: Activate the eSIM in just minutes using a convenient QR code.
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Flexible Duration: Select anywhere from 4-31 days depending on your needs as you travel.
Activating and Using Your Japan eSIM in 3 Steps
Using SimCorner’s unlimited-data eSIM in Japan is simple. Here’s what you need to do in three easy steps:
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Choose a Plan: Select a timeframe between 4 and 31 days.
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Get the eSIM QR Code: Receive the code instantly in your email.
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Stay Connected: Experience unlimited data during your trip.
SimCorner: Your Top Provider of eSIM Solutions
SimCorner is a worldwide leader in connectivity no matter where your travels take you. With our Japan Unlimited Data solution, you can enjoy dependable access to social media, maps, translation apps, and more while avoiding data restrictions and roaming fees. We also offer 24/7 support, so contact us for help whenever and wherever you need us. Order your eSIM today!
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SimCorner’s Unmatched Guarantees for Global Connectivity
Every SimCorner eSIM or SIM card you purchase is protected by our official service guarantees.
5% Price Beat Guarantee
Find the same plan at a lower price elsewhere? We will beat it by 5%—even on sale.
30-Day Price Lock Guarantee
If our price drops within 30 days of your purchase, we will credit you the difference.
100% Money-Back Guarantee
Experienced a technical failure we cannot fix? Receive a hassle-free full refund.
eSIM Japan Reviews & Ratings
4.9/5
Overall Rating
Based on Verified Ratings
Photos from Customers (77 photos)
No reviews to display yet.
USD$16.00
Group trip?
Order for everyone
1
Secure payment guaranteed.
eSIMs are instantly delivered to your email!
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.