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 |
| Supabase (Supabase Inc.), managed by the Lab | AI help chat (the chat at the bottom right of the screen): conversation content / session ID (only when that feature is used; deleted automatically 90 days after the conversation starts) | Improving the quality of responses, responding to inquiries | Supabase privacy policy |
| Google Gemini API (Google LLC) | Free-text input and chat history from the estimate feature, and conversation content from the AI help chat (only when those features are used) | Structuring estimate input, generating AI responses | Gemini API terms |
| Google Maps Platform (Google LLC) | Location data shown on maps in the operator’s admin features (current position and coordinates derived from addresses), and addresses or search terms used for geocoding and business lookup (only when the operator uses those features) | Displaying maps, geocoding addresses, finding businesses to visit | Google privacy policy |
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
- July 24, 2026 — Added the AI help chat to the external transmission policy: conversation content and session IDs are stored, then deleted automatically after 90 days
- July 26, 2026 — Stated that conversation content from the AI help chat is also sent to the Gemini API, and clarified when the 90-day retention period starts (from the beginning of the conversation)
- August 31, 2026 — Added Google Maps Platform (maps, geocoding, and business lookup in the operator’s admin features) to the external transmission policy