Privacy policy / External transmission policy
This policy describes how Nihonbashi AI Lab (the Lab) handles personal information, cookies, and externally transmitted data on the website nihonbashi.ai and related services. The Japanese version of this policy is the authoritative text; this English version is provided for convenience.
1. Information we collect
To understand how visitors use the site and to improve our services, the website automatically collects:
- Pages viewed (URL, time on page, referrer)
- Buttons and links clicked (CTAs, navigation)
- Device information (browser, OS, screen size)
- IP address (used in anonymized form)
2. External transmission (per Japan’s amended Telecommunications Business Act)
Collected information may be transmitted to the following external services:
| Recipient | Data transmitted | Purpose | Privacy policy |
|---|---|---|---|
| Google Analytics 4 (Google LLC) | Page view history / CTA clicks / device information / anonymized IP | Analysis of website usage | Google privacy policy |
| Cloudflare Web Analytics (Cloudflare, Inc.) | Page view history / device information (cookieless) | Backup analysis of site performance and traffic | Cloudflare privacy policy |
| Formrun (Basic Inc.) | Name, company, email address, and message entered in the contact form | Responding to inquiries, preparing for meetings | Formrun privacy policy |
| Supabase (Supabase Inc.), managed by the Lab | Estimate session ID / questionnaire answers / estimate results / chat history (only when those features are used) | Storing and displaying estimate results, preparing for meetings | Supabase privacy policy |
| Google Gemini API (Google LLC) | Free-text input and chat history from the estimate feature (only when that feature is used) | Structuring estimate input, generating AI responses | Gemini API terms |
The Google Gemini API is operated by Google LLC in the United States, and data may be processed in US regions. We use the paid tier of the Gemini API, where data is not used for model training by default.
3. Cookies
Google Analytics 4 uses cookies for analysis. If you prefer not to allow cookies, you can disable them in your browser settings (for example: Chrome settings → Privacy and security → Cookies).
Cloudflare Web Analytics does not use cookies at all (cookieless analytics).
4. Personal information
Personal information collected through the contact form (name, email address, and similar) is used only to respond to your inquiry and to provide information about the Lab’s services. It is not provided to third parties.
To deliver services, respond to inquiries, and store estimate results, we may process and store information using the external services listed above.
5. Contact
For questions about this policy, please use the contact form.
6. Revision history
- May 24, 2026 — First published (external transmission policy covering GA4 / Cloudflare Web Analytics / Formrun / Supabase)
- June 21, 2026 — Removed references to Google Cloud Speech-to-Text following the decision not to adopt voice intake; limited the stated use of the Gemini API to the estimate and chat features