Privacy Policy

1. Business operator

Business name: optimal plan

Contact: contact@optimalplan.jp

2. Information we collect

We collect the following information directly from you.

Through the contact form

• —Name or nickname
• —Email address
• —Company or organization name (optional)
• —Country or region (optional)
• —Research request and related details

Through email correspondence

• —The content of inquiries, requests, and follow-up communications
• —Additional information provided during the research process

Payment-related information

Credit card payments are processed through Stripe, Inc. Card numbers and payment credentials are handled by Stripe and are not stored by us. For bank transfers, we retain records of payment confirmation information (such as transfer name and date) for transaction management purposes. We also retain records of payment method, amount, and payment status as part of our business records.

3. How we use the information

We use the information collected for the following purposes:

• —Responding to inquiries
• —Assessing and clarifying research requests
• —Providing quotes
• —Conducting research and delivering results
• —Processing payments
• —Managing projects and business records
• —Necessary communications related to the service

We do not use personal information for purposes other than those listed above.

4. Business records we retain

We may retain the following records for project management and service delivery:

• —Inquiry emails and correspondence with clients
• —Research request details, research notes, and delivery records
• —Payment and transaction records

5. Use of third-party services

Google Analytics (GA4)

We use Google Analytics (GA4) to understand how visitors use this site. Google Analytics may collect information such as pages visited, device type, and referral sources using cookies and similar technologies. This information is handled in accordance with Google's terms and privacy policy.

You can disable data collection by adjusting your browser's cookie settings or using Google's opt-out tool.

Google Search Console

We use Google Search Console to monitor the site's search performance. This tool provides aggregated data about search index performance and does not individually track visitor activity.

AI tools

We may use external AI tools such as ChatGPT and Claude to assist with tasks including translation, organizing research notes, and drafting. When doing so, we limit the information shared to what is operationally necessary and take care not to input directly identifying information such as names or email addresses. AI-generated text is never treated as evidence or a source in our research deliverables.

6. Disclosure to third parties

We do not disclose personal information to third parties except in the following cases:

• —With the consent of the individual
• —When using payment services such as Stripe for payment processing
• —When required to do so by applicable law

External services such as Google Analytics and AI tools are used as operational aids. We do not sell or share personal information for marketing purposes.

7. Security

We take appropriate and reasonable measures to protect personal information against unauthorized access, loss, or disclosure.

8. Your rights

You may contact us regarding the personal information we hold about you. We will verify your identity as necessary and respond appropriately. Please reach out using the email address below.

9. Policy updates

This Privacy Policy may be updated from time to time. When significant changes are made, we will notify users on our website where appropriate. The updated policy takes effect when it is published.

10. Contact

For questions about this Privacy Policy, please contact:

optimal plan