Privacy Policy

Effective as of: April 13, 2024

Last updated: May 16, 2024


Comprehensible Japanese and its authorized personnel (“us”, “we”, or “our”) operate the website (“Website”, “Service”). This Privacy Policy outlines how we collect, use, maintain and disclose your personal information when you (“your”, “user”, “users”) interact with the Website.

We will not use or share your information with anyone except as described in this Privacy Policy.

By using the Service, you hereby consent to our Privacy Policy and agree to its terms.

We encourage you to read this document carefully to make informed decisions about your privacy. We strive to be transparent about our data practices, ensuring you have a clear understanding of how your information is handled. If you have any questions or concerns, please don’t hesitate to contact us at or via our mailing address below (see “Contact Us”).

We also operate the website (the “Community Site”). The Community Site has its own privacy policy located at Agreeing to this Service’s Privacy Policy does not mean you automatically agree to the Community Site’s privacy policy.

Personal data we collect

We may collect certain personal identification information from and about our users including, but not limited to:

  • Email address
  • Username
  • Profile picture
  • Customer IDs from payment processors (see “Payment information” below)
  • Usage data (see “Usage Data” below)

How we use collected information

We may collect and use your personal information for purposes including, but not limited to:

  • To provide and improve the Service
  • To provide and improve customer service
  • To personalize user experience
  • To identify you during the login process
  • To send transactional emails initiated by user requests, such as password reset emails, lesson scheduling confirmation emails, etc
  • To send customer service emails
  • To send newsletter emails (if opted-in)
  • To statistically analyze trends and other data
  • To develop a new service

Methods of collection

We may collect personal identification information from users in a variety of ways, including, but not limited to:

  • When a user visits the site
  • When a user registers for an account
  • When a user subscribes for a paid subscription and/or a free trial
  • Via the Settings forms (
  • Other forms on the website

Methods of disclosure

We do not sell, trade, or rent users personal identification information to others. We may share generic aggregated demographic information not linked to any personal identification information. We may also display some information publicly on the Website (see “Publicly displayed information”).

Publicly displayed information

Some personal identification information may be publicly displayed in various places on our Website and Community Site. Upon joining the Community Site, such information will be displayed publicly on the Community Site regardless of your privacy settings on this Website. Some of such information is optional for you to provide, but may lead to a limited user experience if not provided. Such information includes:

  • Username (required)
  • Display Name (optional; defaults to username)
  • Profile picture (optional)

Such places where said information may be publicly displayed on the Website includes, but is not limited to:

  • Comments
  • Challenge leaderboards
  • Profiles
  • Discussions

Payment information

We do not learn users’ sensitive payment details, such as credit card numbers. Such information is received and handled by our payment processor (e.g. Stripe) over a secure connection. Through our payment processor, we are able to view basic data related to transactions that allow us to provide customer support and conduct business including, but not limited to:

  • Full Name
  • Email address
  • Last four digits of credit cards
  • Credit card expiration date
  • Customer ID
  • Billing address

Such information is accessible to us via our payment processors’s website (e.g., and our payment processor’s API using your Customer ID which we store on our servers.

Usage Data

Usage Data is collected automatically when you use the Service. Usage Data may include, but is not limited to:

  • Your IP address
  • Your user agent string (which includes information such as browser type, browser version, and operating system information)
  • The pages of our Website that you visit
  • The time and date of your visit
  • The time spent on those pages
  • Your interactions on those pages
  • Unique device identifiers
  • Other diagnostic data

Like most website operators, we collect this data to better understand how our visitors use our services, and how we may improve your experience of our website in future. We do not share data specifics publicly, but may disclose aggregated and anonymised versions of this information, e.g. in website usage trend reports.

Third-Party Services

We may employ third-party companies and individuals on our websites for purposes including, but not limited to:

  • Payment processing with Stripe or another payment processor
  • User analytics with Google Analytics or another analytics service
  • Error reporting with or another error reporting service

These third parties have access to your personal information only to perform specific tasks on our behalf, and are obligated not to disclose or use it for any other purpose.


We may use cookies on this site for several purposes including, but not limited to:

  • Maintaining your session. When you log in, we give a cookie to your browser so that the Website knows who you are and shows you appropriate content. The cookie is deleted when you log out.
  • Analytics. We may also make use of certain third-party tools to understand usage of our website. For example, Google Analytics.

Your rights

You have the right to request that we delete your personal data that we have collected about you. You may do so by contacting us (see “Contact Us” below). Please note, however, that we may need to retain certain information when we have a legal obligation or lawful basis to do so.

Law enforcement

Under certain circumstances, we may be required to disclose your personal data if required to do so by law or in response to valid requests by public authorities (e.g. a court or a government agency).

Other legal requirements

We may disclose your personal data in the good faith belief that such action is necessary to:

  • Comply with a legal obligation
  • Protect and defend our rights or our property
  • Prevent or investigate possible wrongdoing in connection with the Website
  • Protect the personal safety of Users of the Service or the public
  • Protect against legal liability


We take precautions to protect your information. However due to the nature of information transmission and data storage, no method can be 100% safe and therefore we cannot guarantee the absolute security of any information you share with us.

Children’s Privacy

Our Service does not address anyone under the age of 13. We do not knowingly collect personally identifiable information from anyone under the age of 13. If you are a parent or guardian and you are aware that your child has provided us with personal data, please contact us. If we become aware that we have collected personal data from anyone under the age of 13 without verification of parental consent, we will take steps to remove that information from our servers.

Business Transfers

If we or our assets are acquired, or in the unlikely event that we go out of business or enter bankruptcy, we may include user information among our assets transferred to or acquired by a third party. We will provide notice in advance of such transfer.

Links to Other Websites

Our Website may contain links to other sites unaffiliated with us. Please be aware that we are not responsible for the content or privacy practices of such other sites. We encourage our users to be aware when they leave our site and to read the privacy statements of any other site that collects personally identifiable information.

Changes to this Privacy Policy

We may update this Privacy Policy at any time. We will notify you of such changes by posting the new Privacy Policy on this page. Changes to this Privacy Policy are effective when they are posted on this page. Your continued use of this site after any changes to this policy will be regarded as acceptance of our practices around privacy and personal information. You are advised to review this Privacy Policy periodically for any changes.

Contact Us

If you have any questions about this Privacy Policy, please contact us:

  • By visiting this page on our website:
  • By mail: T&J Building 7F, 2-2-12 Tenjin, Chuo-ku, Fukuoka-shi, Fukuoka 810-0001, Japan

List of Authorized Personnel

The following people are authorized personnel of Comprehensible Japanese:

  • Yuki Kimura, residing in Fukuoka, Japan
  • Benjamin Maerkle, residing in Connecticut, USA