Japan Unlimited Data SIM - SimCorner

Japan Unlimited Data SIM

AUD$65.00
Group trip? Order for everyone
AUD$65.00

JapanUnlimited Data SIM Card (15 / 31 Days | No Daily Limit | KDDI)

Ensure your device supports eSIM before buying.
No Calls
1 Country
Phone No. Available
Unlimited Data
15 DAYS
$65 $4.33/Day
Unlimited Data
31 DAYS
$105 $3.38/Day

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%!

AUD$65.00
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%!

Received Canstar Awards
2019 & 2023

Received Canstar Awards Received Canstar Awards
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Price Drop? Get a Refund!

If you discover the same SIM card product at a lower price from a competitor (even if it's on sale), we'll beat that price by 10%.

How It Works

1
Found a better price? Email us the competitor's direct product website link at email our support team at support@simcorner.com or contact us through our contact form.
2
Our customer service team will review the product link to verify if it meets our criteria.
3
If approved, you can purchase as normal, and we will refund the price difference. If not, we'll let you know why it was declined.

Price Beat Criteria

  • The product must be identical (same country, carrier, data, validity).
  • The price must be publicly available.
  • The competitor & SimCorner must both have stock available.
  • You must submit the Price Beat request before purchasing.
  • Exclusions may apply (e.g., temporary promotions, bundles).

Found a Better Price? Let Us Know!

🚀 Shop with confidence knowing you're always getting the best deal at SimCorner!

Need Help? Contact Us

Seen It for Less? We’ll Beat It!

Found your purchased SIM at a lower price on SimCorner within 30 days?. Just email support@simcorner.com with your order details, and we’ll refund the difference.

Why Shop with SimCorner?

Risk-Free Shopping – Get the best price, always!

Hassle-Free Refunds – Simply email us if you see a price drop.

No FOMO on Sales – Buy now, save later!

Terms & Conditions

  • Price Lock Guarantee is valid only for purchases made on SimCorner.
  • The price drop must be on the same product (same plan, validity, and region).
  • The claim must be submitted within 30 days of purchase.
  • Refunds will be processed to the original payment method.

Found a Better Price? Let Us Know!

🚀 Shop with confidence knowing you’re always getting the best deal at SimCorner!

Need Help? Contact Us

Feature Overview Country Coverage Things to Know Shipping Device Compatibility Guide FAQs

Product Features

Check Device Compatibility

📶 Data

Unlimited Data (no daily limit)

Data Speed

4G/5G Data speeds

📞 Calls

Not included

💬 Texts

Not included

📲 Phone Number

Not Included

📡 Hotspot/Tethering

Varies by plan  15 days (15GB); 31 days (30GB)

Validity

15 or 31 Days of service from activation

 

🕒 When to install

Upon arrival at your destination

Why Customers Love SimCorner SIM Cards

4.8 | 26,000+ Positive Reviews
Flexible Validity

Flexible Validity

Choose from our range of plans with flexible durations to match your travel needs perfectly, whether it's a short trip or extended stay.

Wide Coverage

Wide Coverage

Enjoy seamless connectivity with our extensive network coverage. See full coverage here

No Hidden Fees

No Hidden Fees

Travel with confidence knowing all costs are upfront—no roaming charges, no hidden fees, just straightforward pricing.

Budget-Friendly Options

Budget-Friendly Options

Our plans keep you connected at an affordable rate, without the fear of unexpected charges.

Customer Support Anytime

Customer Support Anytime

Our dedicated support team is available around the clock 7 Days a week to assist you with any questions or technical needs.

Easy Setup, Instant Activation

Easy Setup

Get connected quickly by simply inserting your SIM card into your device upon arrival at your destination.

Important Note

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 SIM Card has No daily data caps and is purely unlimited.

Country Coverage

Japan

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.

  1. Order your travel SIM online and select the delivery method that best suits your travel date. SimCorner delivers to many countries across the world and has dispatch locations in Australia, Canada, New Zealand and United Kingdom.
  2. Receive your Japan SIM card in the mail prior to departing for your trip.
  3. Insert your Japan SIM card in your phone as soon as you land and stay connected.

Unlimited Data

Fast 4G/5G Data speeds upto 1000Mbps Download and 100Mbps Upload.

This is the maximum potential speed and not guaranteed. On average, 5G can reach up to 860Mbps under optimal conditions. Download speeds and quality depend on many factors like location, device, network congestion, and coverage.

This Prepaid Japan SIM card is a Data ONLY sim and as such it does not come with calls and text.

However, we recommend that you use data based apps such as Whatsapp, Viber, Skype, Messenger, etc to make phone calls and send messages. 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.

As this prepaid Japan SIM cannot be recharged, if you feel you need more Data then please purchase multiple sims accordingly. Baring in mind that each time you activate one sim you will have 15 or 31 days to use the data according to the plan you purchased.

Only the Nano size is available for this SIM card. Please verify if your phone has a nano sim by looking at its specifications before purchasing.

 

Simply insert and install the SIM once you land in Japan. Your days of service will start when the SIM is connected to a network. This will be the day that your service commences.

We recommend turning off your local eSIM/physical sim or removing your physical sim so you don't accidentally use your local carriers service.

Turn on Mobile data and Data Roaming for your SIM whilst to start using your data.

Days of service are calculated according to Japan Standard Time (GMT+9) and reset at 00:00 (midnight) each day, not based on a 24-hour period.

This is a data only SIM. It does not come with a phone number.

  • Order your travel SIM online and select the delivery method that best suits your travel date. SimCorner delivers to many countries across the world and has dispatch locations in Australia, Canada, New Zealand and United Kingdom.
  • Receive your Japan SIM card in the mail prior to departing for your trip.
  • Insert your Japan SIM card in your phone as soon as you land and stay connected.

Make sure that your device is unlocked before you depart for your trip.

Please note: Being on a post-paid plan or contract with your local carrier doesn't mean your phone is locked. If you are unsure, please check with your current service provider.

You can keep track of your Data usage through your phone's data usage function (found in Settings).

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:

  • 15 days – 15GB
  • 31 days – 30GB

Japan

Once the SIM is loaded, you simply need to have both MOBILE DATA and DATA ROAMING functions ENABLED/TURNED ON in your phone to use the service. If you face issues, then you might need to update the APN Setting in your device as noted in the booklet.

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 instructions provided.

This SIM can connect to different network partners in the country

Depends on the SIM purchased you can either have 15 days or 31 days of service. Your days of service will start when the SIM is connected to a network. This will be the day that your service commences.

If you are travelling for longer than 31 days, please purchase multiple sims accordingly. For example, if you are travelling for 45 days then purchase 2 of these sims and swap them over at the end of the 31 day period.

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 SIM is connected to a network in Japan. 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.

Should you run into any issues with the sim 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 along with the SIM number and phone number.
  • Which country you are in currently and whether the sim connects to any network, if so, which network?
  • Did you receive any SMS after you inserted the sim? 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 are not able to send SMS and make phones calls with this Japan SIM Card. We recommend that you use data based 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, if you purchase 2 Japan SIM cards then you will be able to contact each other via data based apps such as Whatsapp, Viber, Snapchat, Messenger, Skype etc.

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.

Yes, you will have access to all your apps, messages, contacts and emails whilst using this Japan SIM card. Nothing on your phone is deleted or changed and you can continue to use your phone as per normal. 

Any Unlocked 4G/5G device (device not locked to any network). If you are unsure, please contact your service provider for more details. 

* Please make sure your phone/device is unlocked and supports 4G or 5G networks and the specification of the phone includes Band18/Band 26 (800Mhz) in 4G/LTE. 5G bands includes: n78(3.3~3.8GHz), n79(4.5~4.6GHz), n257(27.4~27.8GHz)

There are many other models that support the Bands/frequencies mentioned. If you are not sure please e-mail us at: support@simcorner.com for assistance.

 

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.

  • Order your travel SIM online and select the delivery method that best suits your travel date. SimCorner delivers to many countries across the world and has dispatch locations in Australia, Canada, New Zealand and United Kingdom.
  • Receive your Japan SIM card in the mail prior to departing for your trip.
  • Insert your Japan SIM card in your phone as soon as you land and stay connected.

Make sure that your device is unlocked before you depart for your trip.

Please note: Being on a post-paid plan or contract with your local carrier doesn't mean your phone is locked. If you are unsure, please check with your current service provider.

This is a data only SIM. It does not come with a phone number.

You can keep track of your Data usage through your phone's data usage function (found in Settings).

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:

  • 15 days – 15GB
  • 31 days – 30GB

Japan

Once the SIM is loaded, you simply need to have both MOBILE DATA and DATA ROAMING functions ENABLED/TURNED ON in your phone to use the service. If you face issues, then you might need to update the APN Setting in your device as noted in the booklet.

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 instructions provided.

This SIM can connect to different network partners in the country

Depends on the SIM purchased you can either have 15 days or 31 days of service. Your days of service will start when the SIM is connected to a network. This will be the day that your service commences.

If you are travelling for longer than 31 days, please purchase multiple sims accordingly. For example, if you are travelling for 45 days then purchase 2 of these sims and swap them over at the end of the 31 day period.

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 SIM is connected to a network in Japan. 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.

Should you run into any issues with the sim 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 along with the SIM number and phone number.
  • Which country you are in currently and whether the sim connects to any network, if so, which network?
  • Did you receive any SMS after you inserted the sim? 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 are not able to send SMS and make phones calls with this Japan SIM Card. We recommend that you use data based 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, if you purchase 2 Japan SIM cards then you will be able to contact each other via data based apps such as Whatsapp, Viber, Snapchat, Messenger, Skype etc.

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.

Yes, you will have access to all your apps, messages, contacts and emails whilst using this Japan SIM card. Nothing on your phone is deleted or changed and you can continue to use your phone as per normal. 

Still Need help?

Reach out to us via email support@simcorner.com or
contact us with your query!

Shipping

How to Activate SIM Card?

  1. 1
    Follow the instruction

    Follow the activation process as per the instruction sheet.

  2. 2
    Insert your SIM Card

    Make sure your phone is turned off. Insert your SIM card into the SIM tray.

  3. 3
    Turn on your phone

    Power on your device and wait for it to recognise the SIM card.

  4. 4
    Confirm network connection

    You should see signal bars or a network name at the top of your screen.

  5. 5
    Set up your phone

    Once activated, your device may prompt you to configure settings or install updates.

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100% money-back guarantee

5% price beat + 30 Day price lock guarantee Know more

Reviews & Ratings

Customer Reviews

Based on 14 reviews
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(14)
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B
Bella
15 DAYS Unlimited Data

It was a huge relief to have access to unlimited internet. While I didn't use a lot of data in the end, it was there for researching tourism, translation, and anything else. My first SIM wouldn't activate but they solved it within 12 hours. I've used other SIM companies I couldn't use the SIM (physical) for days because of some issue which is super stressful when traveling in a foreign country especially when it's not your own language

E
Elizabeth
31 DAYS Unlimited Data

Really great! Set it up when I was still in my home country so the minute I landed in Japan I was already connected. I had a couple of concerns when setting it up and reached out to the SimCorner team and they were super prompt and helpful in their responses. Would definitely get one of their sims when traveling overseas again.

M
Martin
10 DAYS Unlimited Data

All good and straightforward.

A
Anonymous
[eSIM] Japan Unlimited Data.

Our eSIM arrived promptly along with instructions for using it.
The instructions were concise and easy to follow. The eSIM worked perfectly during our trip.

J
Jacqueline B.
NZ 7 day trip

Super easy to purchase, set up and use on arrival, plenty of data and no issues with access, great experience!

J
Joy Ocfemia
Japan 2025

Very satisfied customer. From Tokyo - Sapporo - Osaka - Kyoto always connected. No hassle and with good connection.

K
KAREN B.
Seamless

First time using a travel eSim, and it was simple and seamless!Easy to follow instructions, uninterrupted internet coverage all over Japan. I chose the 15 day unlimited plan for Japan and I don't hesitate in recommending it.

y
yoori k.
Great data quality

Never had issues with data! Great connections!

AUD$65.00
Secure payment guaranteed

Japan Unlimited Data SIM Card (no daily limit) | KDDI

Travel hassle-free in Japan with our Unlimited Data SIM for 15 or 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 SIM card Japan Unlimited data today and go explore Japan!

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