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Privacy Policy

Last updated: October 8, 2026

Nansuka ("we," "us," or "our") is committed to protecting your privacy when you use our mobile application and related services (the "Service"). This Privacy Policy describes how we collect, use, and safeguard your information.

1. Information We Collect

2. How We Use Your Information

3. AI Processing and Third-Party Services

Your conversation messages are sent to third-party AI service providers (OpenAI and Anthropic) for the purpose of generating responses. These providers process your messages in accordance with their own privacy policies and data handling practices.

We do not use your conversation data for training AI models. We do not sell or share your personal information with third parties for advertising purposes.

4. Topic Cards Feature

News summary data used in the Topic Cards feature is retained on our servers and deleted when it is no longer needed for the feature. No personal information is included in this data.

5. Data Storage and Security

Your data is stored on secure cloud infrastructure. We implement appropriate technical and organizational measures to protect your information against unauthorized access, loss, alteration, or destruction.

5.1 Safety Event Logs

When our automated safety systems detect content indicating a risk of harm (such as expressions of self-harm or threats of violence), we record a safety event consisting of the event category, severity, timestamp, app version, and locale. The text of your message is not stored in safety logs. Safety events are used solely to operate our safety features, protect users, comply with legal obligations, and, in cases of credible threats of harm, to make reports to competent authorities as described in the Terms of Use.

6. Third-Party Disclosure

We do not share your personal information with third parties except:

7. Data Deletion

You can request deletion of your account and associated data at any time through the in-app account deletion feature. Upon deletion, your data will be removed from our systems in accordance with applicable law and our data retention practices.

8. Children's Privacy

The Service is intended only for persons 18 or older. We do not knowingly collect personal information from anyone under 18. If we learn that we have collected such information, we will take steps to delete it promptly.

9. Changes to This Policy

We may update this Privacy Policy from time to time. If we make material changes, we will notify you through the Service or by other appropriate means. Continued use of the Service after changes constitutes acceptance of the updated policy.

Contact / お問い合わせ

contact@nansuka.com