Privacy
Policy

1. Operator and scope

This policy applies to the handling of personal and usage information on this website, operated by Ryosuke Yamada (the “Operator”).

2. Information processed

• IP address, access time, device and browser information processed in hosting logs for secure operation
• Page views, referrer and device category processed by Vercel Web Analytics to improve the site

3. Purposes

• Preventing misuse and maintaining the security and operation of the site
• Understanding usage in a form that does not directly identify visitors and improving the site
• Meeting legal obligations and resolving disputes

4. Service providers

Hosting and analytics use Vercel. This provider may process necessary information, including outside Japan, under its terms and privacy policy.

5. Disclosure to third parties

Personal information is not sold. It is not disclosed without your consent except where required by law, necessary to protect life, safety or property, or entrusted to the providers above to the extent needed for the stated purposes.

6. Retention and security

Information is kept only for as long as reasonably needed for the purposes above and legal requirements, then deleted by reasonable means. Reasonable safeguards are used against unauthorised access, loss, alteration and leakage.

7. Cookies and similar technologies

This site does not independently set advertising cookies. Providers may use technologies needed for delivery and security. You can restrict these technologies in your browser, although some functions may be affected.

8. Your requests

For access logs and usage data that the Operator cannot directly associate with an identifiable individual, we may be unable to identify your data or fulfil an individual request for access, correction, deletion or restriction.

9. Changes to this policy

This policy may be updated when laws or services change. Material changes will be indicated on this page.