This Privacy Policy sets forth the handling of personal information in "StayConcie" (hereinafter "Service") provided by 株式会社ラムダシステム (Lambda System, Inc.) (hereinafter "Company").

Address: 3-23-15 Hagiwara, Oita City, Oita Prefecture, Japan

The Company may collect the following personal information in the course of providing the Service:

• Name and company name
• Email address
• Payment information (credit card information is managed by Stripe, Inc. and is not retained by the Company)
• Access logs and usage history
• Chat content with guests (managed as facility operator data)

Personal information collected is used for the following purposes:

• Provision, operation, and improvement of the Service
• Responding to inquiries
• Billing and payment processing
• Sending important notices regarding the Service
• Detection and prevention of unauthorized use

The Company will not provide customers' personal information to third parties except in the following cases:

• With the customer's consent
• When required by law to disclose
• When necessary for the protection of life, body, or property

The Company outsources the processing of personal information to the following services to the extent necessary for providing the Service. All subcontractors implement appropriate security measures.

• Stripe Inc. (payment processing)
• Cloudflare Inc. (infrastructure and CDN)
• Anthropic PBC (AI processing)

We retain personal data only as long as needed for the purposes above, and delete it automatically once the period ends. Chat content belongs to the property operator, and its retention period follows the plan the property subscribes to.

• Chat content: after the conversation ends and the 7-day reopen window has passed — 90 days (Starter), 365 days (Business), 5 years (Enterprise)
• Audio: AI speech audio is kept for the same number of days from creation. The original audio of a voice message sent by a guest is deleted after 24 hours
• Consent records (timestamp, IP address, browser information): 5 years. A consent that is currently in effect is retained while it remains in effect
• Records created when a QR code is scanned: 5 years. Deleted after 1 day if the guest leaves before consenting
• If no account is created: name, email address, chat content and audio are deleted 30 days after consent

If you delete your account, we delete your name, email address and similar details. Chat content is retained for the periods above to the extent the property operator needs it to handle disputes or support billing, and is deleted automatically once the period ends.

Customers may request disclosure, correction, or deletion of their personal information. To make such a request, please reach out via the Contact Page.

The Service may use cookies for improving usability and conducting access analytics. You may disable cookies through your browser settings; however, some features may become unavailable.

The Company may revise this Policy as necessary. In the event of material changes, notification will be provided through the Service or via email.

For inquiries regarding the handling of personal information, please reach out via the Contact Page.