Privacy Policy

Last Updated: April 15, 2026

Introduction

Welcome to Shirushi ("we," "our," or "us"). We are committed to protecting your privacy and ensuring the security of your personal information. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our Japanese text conversion service.

Information We Collect

Account Information

When you create an account, we collect:

• Email address
• Password (encrypted)
• Authentication tokens (for OAuth sign-in)

Usage Information

When you use our service, we collect:

• Text input and conversion results
• Conversion history and favorites
• Usage statistics and preferences

Technical Information

We automatically collect certain information about your device and usage:

• Browser type and version
• Operating system
• IP address
• Session data

How We Use Your Information

We use the collected information to:

• Provide and maintain our text conversion service
• Process and store your conversion history
• Authenticate your account and manage access
• Improve our AI models and service quality
• Send service-related notifications
• Respond to support requests
• Detect and prevent fraud or abuse

Data Storage and Security

Your data is stored securely using industry-standard practices:

• Encrypted data transmission (HTTPS/TLS)
• Secure cloud infrastructure (Supabase)
• Password hashing and encryption
• Regular security audits and updates

Google User Data

When you choose to sign in with Google, we access and use limited Google user data solely for authentication purposes. Specifically:

• We access your Google email address to create and authenticate your account
• We access your basic profile information (name) if provided by Google
• This data is used only to identify you and provide access to our service
• We do not access, store, or share any other Google account data
• We do not sell, transfer, or disclose Google user data to third parties
• Google user data is retained only while your account is active
• You can revoke our access to your Google data at any time through your Google Account settings

Our use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements.

Third-Party Services

We use the following third-party services that may collect information:

• Supabase: Authentication and database hosting
• Anthropic: AI text processing (Claude API)
• RevenueCat: Subscription management
• Google OAuth: Optional sign-in service

These services operate under their own privacy policies and data handling practices.

Your Rights and Choices

You have the right to:

• Access your personal information
• Update or correct your data
• Delete your account and associated data
• Export your conversion history
• Opt out of marketing communications

Data Retention

We retain your information for as long as your account is active or as needed to provide services. When you delete your account, we will delete or anonymize your personal information within 30 days, except where we are required to retain it for legal obligations.

Children's Privacy

Our service is not intended for users under 13 years of age. We do not knowingly collect personal information from children under 13. If you believe we have collected information from a child under 13, please contact us immediately.

International Data Transfers

Your information may be transferred to and processed in countries other than your country of residence. We ensure appropriate safeguards are in place to protect your information in accordance with this Privacy Policy.

Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any material changes by posting the new Privacy Policy on this page and updating the "Last Updated" date. Your continued use of the service after changes constitutes acceptance of the updated policy.

Contact Us

If you have any questions about this Privacy Policy or our data practices, please contact us at:

合同会社倍半倍
Website: https://baihanbai.jp
Email: contact@baihanbai.jp