Privacy Policy
How personal information is handled when you use TenkaCloud (the "Service"). The Japanese version at /privacy.html is the legally binding original; this English version is provided for reference.
1. Information we collect
To provide the Service and respond to inquiries, we may collect the following. The classification (personal data / secret / operational), storage location, retention, and encryption of each item are listed in our data classification policy.
- Inquiry information: name, organization, contact email, and the body of your inquiry.
- Operator account information: the email address and username of operators who sign in to the Service (System Admin / Tenant Admin / Operator). Stored in Amazon Cognito, our identity provider.
- Operation audit logs: a record of operator actions, including the actor identifier (Cognito sub) and username (= email), the action / target / outcome, the source IP address and User-Agent, and the timestamp. Kept for security auditing and unauthorized-access investigation.
- Event operation data: participant data (= team name / display name), submission logs, and scoring history for events you run on the Service. Stored on the Service's SaaS infrastructure (= AWS) and automatically deleted 7 days after the event ends. Note that we do not create individual participant accounts (name / email); teams authenticate with a short-lived per-team key, so no information directly identifying an individual participant is collected.
- Access logs: IP address, User-Agent, referrer, etc. for visitors to the landing page and the portal. Retained per the standard logging policies of GitHub Pages / Amazon CloudFront.
2. Purpose of use
- Replying to inquiries and providing quotes.
- Operating the Service, responding to incidents, and security auditing.
- Statistical analysis to improve the Service (= in a form that does not identify individuals).
- Compliance with legal requirements (= legitimate requests from police, courts, etc.).
3. Disclosure to third parties
We do not disclose personal information to third parties without your consent, except as required by law. Data may, however, be stored on the following cloud providers (= used as infrastructure; not for content inspection):
- Amazon Web Services, Inc. (= SaaS infrastructure provider)
- GitHub, Inc. (= landing page delivery and OSS repository host)
4. Retention
- Inquiry information: 2 years after the engagement ends.
- Operator account information: until the account is removed.
- Operation audit logs: 90 days by default; 365 days on hosted plans with SOC2-style requirements (configured via
AUDIT_RETENTION_DAYS). Automatically deleted afterwards. - Event participant data: 7 days after the event ends. Automatically deleted afterwards.
- Access logs: Standard retention of AWS / GitHub.
5. Disclosure, correction, and deletion requests
To request disclosure, correction, or deletion of your personal information, please contact us via the contact channel below. After identity verification, we will respond promptly in accordance with applicable laws.
6. Cookies / tracking
The landing page itself does not set cookies. The participant portal (= portal-demo / production portal) uses localStorage for session management. We do not use cookies or analytics tools for tracking purposes (= as of 2026-05).
7. Revisions
This Policy may be revised in response to changes in law or in the Service. Material revisions will be notified by posting to this page.
8. Contact
For privacy-related inquiries, please contact us via:
- Operator: BULL LLC (合同会社BULL), operator of TenkaCloud
- Channel: GitHub Discussions or the contact form on the landing page