Privacy Policy for LearnKana

Effective Date: June 12, 2025

1. Introduction

Welcome to LearnKana ("we," "us," or "our"). LearnKana operates the website https://learnkana.today.tokyo (the "Service"). We are committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Service.

By using the Service, you agree to the collection and use of information in accordance with this policy.

2. Information We Collect

We collect several different types of information for various purposes to provide and improve our Service to you.

a. Information You Provide Directly

• Account Information: When you register for an account, we collect your email address, username, and a hashed password. We also store your email verification status.
• User-Generated Content: We collect the content you create, including your wordlists (name, description, content) and their associated metadata (author username, creation/update timestamps).
• Saved Lists: We store a record of the wordlists you save to your personal profile for easy access.

b. Information We Collect Automatically

• Usage Data (via Google Analytics): We use Google Analytics to help us understand how our Service is used. This service collects information such as your device and browser type, operating system, IP address (which is anonymized by Google Analytics 4), pages visited, time spent on pages, and the links you click on.
• Security Data (via Cloudflare Turnstile): We use Cloudflare Turnstile to protect our Service from spam and bots. This service may process your IP address and other browser signals to determine if you are a human user. We do not store this IP address ourselves.

c. Information from Third-Party Services (Future Implementation)

• Third-Party Logins (Google & Discord): If you choose to register or log in using a third-party service like Google or Discord, we will receive certain profile information from them. This may include your name, email address, profile picture, and a unique identifier.
• Advertising Data (Google AdSense): We plan to display ads through Google AdSense. Google and its partners may use cookies to collect information about your visits to this and other websites to provide personalized advertisements.

3. How We Use Your Information

We use the collected data for the following purposes:

• To Provide and Maintain our Service: To create and manage your account, authenticate you, and provide you with access to your wordlists.
• To Improve our Service: To understand user behavior through analytics, helping us to fix bugs, improve features, and enhance the user experience.
• To Ensure Security: To protect our platform from automated abuse and spam using services like Cloudflare Turnstile.
• To Communicate With You: To send you a one-time verification email and important service-related notices. We will not send you newsletters or marketing emails without your explicit consent.
• To Display Content: To show public wordlists to all users and attribute authorship via your username.
• (Future) To Personalize Your Experience: To enable seamless login via Google/Discord and display relevant advertising.

4. How We Share Your Information

We do not sell your personal data. We may share your information with the following third-party service providers who assist us in operating our Service:

• Cloudflare: For website hosting (Workers) and security (Turnstile).
• Google: For Handwriting Recognition (stroke data is sent to their API), Google Analytics, and future implementations of Google AdSense and Google Login.
• Discord: For future implementation of Discord Login.

These third parties have access to your Personal Data only to perform these tasks on our behalf and are obligated not to disclose or use it for any other purpose. We encourage you to review their respective privacy policies.

5. Cookies and Local Storage Technologies

We use cookies and browser local storage to operate and improve the Service.

• Cookies: These are small files stored on your device. We use them for necessary functions like keeping you logged in (authentication), remembering your preferences (like light/dark mode), security, and for analytics and advertising (via third parties like Google).
• Local Storage: We use your browser's local storage to cache wordlists on your device. This makes the application load faster and allows for better performance. This data is stored only in your browser.

You can instruct your browser to refuse all cookies or to indicate when a cookie is being sent. However, if you do not accept essential cookies, you may not be able to use some portions of our Service.

6. Data Security

The security of your data is important to us. We use industry-standard practices, such as password hashing and HTTPS (SSL/TLS) encryption, to protect your data. However, no method of transmission over the Internet or method of electronic storage is 100% secure.

7. Your Data Rights

Depending on your location, you may have rights under laws like GDPR, including:

• The right to access, update, or delete the information we have on you.
• The right of rectification.
• The right to object to processing.
• The right to data portability.

You can manage your account data through your profile settings or by contacting us directly.

8. Children's Privacy

Our Service is not intended for use by anyone under the age of 16. We do not knowingly collect personally identifiable information from children under 16. If you become aware that a child has provided us with Personal Data, please contact us. If we become aware that we have collected Personal Data from children without verification of parental consent, we take steps to remove that information from our servers.

9. Changes to This Privacy Policy

We may update our Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Effective Date" at the top. You are advised to review this Privacy Policy periodically for any changes.

10. Contact Us

If you have any questions about this Privacy Policy, please contact us at: contact.learnkana@today.tokyo