Privacy Policy

1. Introduction

TORAIZ Inc. ("we", "our", "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and protect your information when you use Fujisan.AI, including our website (fujisan.ai) and our Android application available on Google Play (collectively, the "Service").

2. Information We Collect

2.1 Personal Information

• Email address (required for account creation)
• Name (optional, collected via Google sign-in)
• Payment information (processed securely by Stripe for web purchases and by Google Play Billing for Android app purchases — we do not store your credit card details)
• JLPT target level and learning preferences

2.2 Learning Data

• Progress and completion records
• Test scores and assessment results
• Study time and usage patterns

2.3 Voice and Conversation Data

• Voice recordings when using the voice input feature in AI conversation practice (processed in real-time and not stored on our servers)
• Text messages sent during AI conversation practice

2.4 Technical Data

• Device information (browser type, OS, device model)
• IP address and approximate location
• Cookies and similar tracking technologies

3. How We Use Your Information

• Provide and personalize the learning experience
• Process payments and manage subscriptions
• Generate AI-powered responses for conversation practice and learning coaching
• Convert voice input to text for conversation practice
• Send service-related communications
• Improve our products and services through analytics
• Prevent fraud and ensure security

4. Cookies and Tracking

We use cookies and similar technologies for:

• Essential: Authentication and security (required)
• Analytics: Understanding how you use the Service (optional)
• Advertising: Measuring the effectiveness of our advertising campaigns (optional)

You can manage cookie preferences through our cookie consent banner. Analytics and advertising cookies are only activated with your consent (Consent Mode v2).

5. Data Sharing

We do not sell your personal information. We share data with the following third-party service providers to operate the Service:

• Stripe: Payment processing for web subscriptions
• Google Play Billing: Payment processing for Android app subscriptions
• Google Firebase: Authentication, data storage, and file hosting
• Google Analytics: Usage analysis (subject to your cookie consent)
• Google Gemini API: AI conversation generation and learning coaching (your messages and aggregated learning data are sent to generate responses)
• Microsoft Azure: Voice-to-text conversion (voice data is processed in real-time and not stored) and text-to-speech audio generation
• Netlify: Website and API hosting

6. Data Retention

We retain your data while your account is active. After account deletion, we may retain certain data for up to 90 days for legal and operational purposes. Shared content (such as feedback submissions) may be anonymized and retained.

7. Your Rights (GDPR)

If you are in the European Economic Area, you have the right to access, correct, delete, restrict, or port your personal data, and to withdraw consent.

8. Your Rights (CCPA)

California residents have the right to know what personal information is collected, request deletion, and opt-out of the sale of personal information. We do not sell your personal information.

9. Children's Privacy

The Service is not intended for children under 13. We do not knowingly collect personal information from children under 13.

10. Security

We implement industry-standard security measures including encryption in transit (TLS/HTTPS), access controls, and regular security audits to protect your data.

11. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of material changes by posting the updated policy on this page with a revised effective date.

12. Contact Us

For privacy-related inquiries: support@fujisan.ai

TORAIZ Inc. — Tokyo, Japan