Raiden Numerics G.K. (雷電ニューメリックス合同会社, hereinafter "we" or "the Company") respects the privacy of customers, prospects, and visitors and complies with the Japanese Act on the Protection of Personal Information (個人情報保護法) and other applicable laws. This Privacy Policy describes how we collect, use, and protect personal information in connection with the mufem software product.

1. Business Operator事業者

雷電ニューメリックス合同会社 (Raiden Numerics G.K.)
Representative: Paul Hilscher
Address: 〒607-8131 Otsuka Minamimizo-chō 1-9, Yamashina-ku, Kyoto-shi, Kyoto, Japan
Contact: mufem@raiden-numerics.com

2. Information We Collect取得する情報

We collect personal information only when you actively provide it to us or when it is necessary to deliver a service you have requested. Depending on how you interact with us, this may include:

• Inquiries via email — name, email address, company affiliation, and the content of your message.
• Licensing — for customers entering into a software license agreement: company name, billing information, technical contact details, and information required to deliver and support the Software.
• Software license activation — for users activating a paid license: license key, a machine fingerprint derived from stable system identifiers, hostname (used as a human-readable machine name in your account view), IP address (logged by our licensing provider for fraud prevention), and activation and last-seen timestamps.
• Customer dashboard account — when you sign in to the dashboard (with Google or an emailed sign-in link): email address, display name, Google profile information provided by Google sign-in (such as your name and profile picture), the account identifier assigned by Firebase Authentication, sign-in provider, and account creation and last-sign-in dates. We use this to show you your license key, subscription status, and activated machines, and to link your account to your subscription.
• Billing — name, email address, billing address, VAT/tax identifier, and payment method details. Payment method details are collected and handled exclusively by Paddle as Merchant of Record; we never see card data.

Free-tier users of the Software do not activate against our servers, and no personal data is transmitted to us when running the Software under that tier.

We do not collect simulation data, meshes, materials, geometries, results, telemetry from your simulation runs, or file contents from your machine.

We do not knowingly collect personal information from individuals under the age of 16.

3. Purposes of Use利用目的

We use personal information for the following purposes only:

• To respond to inquiries and provide requested information.
• To negotiate, deliver, invoice, and support software licenses.
• To enforce the terms of our software licenses (e.g. preventing one license being activated on many machines) and prevent abuse of activation.
• To process subscription payments and collect the correct tax, via Paddle as Merchant of Record.
• To comply with legal obligations (taxation, accounting, recordkeeping).
• To improve the Software and our communications with customers.

We do not use personal information for any other purpose without obtaining your consent. We do not sell, rent, or share your data with third parties for advertising or analytics.

4. Third-Party Sharing and Sub-Processors第三者提供・委託先

We do not sell personal information. We share personal information with third parties only in the following limited cases:

• Service providers (委託先) who process information on our behalf under contractual confidentiality and security obligations. Current providers include:
  • Google LLC — email (Google Workspace), website hosting (Firebase Hosting), dashboard sign-in (Firebase Authentication, including Google sign-in), and the backend that stores and processes subscription and license records (Cloud Functions for Firebase and Cloud Firestore).
  • Paddle.com Market Limited — payment processing, Merchant of Record. See Paddle's privacy policy.
  • Keygen, Inc. — license management and activation infrastructure for the Software. See Keygen's privacy policy.
• When required by law or by a binding order from a competent authority.
• With your prior consent.

Some of these service providers are located outside Japan (primarily the United States and the European Union). By using our services, you understand that your personal information may be transferred to and processed in those jurisdictions. Where sub-processors are located outside the EU, we rely on Standard Contractual Clauses for the transfer.

5. Retention保存期間

We retain personal information only for as long as necessary for the purposes set out above:

• Activation records: lifetime of your subscription plus 12 months.
• Dashboard account and subscription records: lifetime of your account; deleted on request once no active subscription remains and legal retention obligations allow.
• Billing data: per Paddle's retention policy (typically 7 years for tax compliance).
• Support correspondence: 3 years.
• Other inquiries: as long as needed to follow up, and thereafter deleted on request.

6. Cookies and Analyticsクッキー

This website does not use tracking cookies or analytics. The customer dashboard stores data in your browser that is strictly necessary for signing in: Firebase Authentication keeps your sign-in state in browser storage, and when you request an emailed sign-in link, your email address is stored temporarily in local storage so the link can be completed on the same device. This data stays in your browser and is removed when you sign out or clear your browser data. Third-party services linked from this website (such as Paddle's checkout) may set their own cookies when you interact with them, governed by their own privacy policies.

7. Data Security安全管理措置

We take reasonable and appropriate organizational and technical measures to protect personal information against loss, misuse, unauthorized access, disclosure, and alteration. These measures include encrypted transmission (TLS/HTTPS), access controls on internal systems, and confidentiality obligations on personnel and subcontractors.

8. Your Rights開示・訂正・削除等の請求

You have the right to request access to, correction of, deletion of, export of, or suspension of use of your personal information that we hold (rights under the Japanese Act on the Protection of Personal Information, the GDPR, and similar regimes apply where applicable). To exercise these rights, please contact us at the address below. We will respond within 30 days after verifying your identity. You may also lodge a complaint with your local data protection authority.

9. Contactお問い合わせ窓口

For questions about this Privacy Policy or about the handling of your personal information, please contact:
Raiden Numerics G.K. — mufem@raiden-numerics.com

10. Changes to This Policy改定

We may revise this Privacy Policy from time to time to reflect changes in our practices or in applicable law. The current version is always available on this page, and the effective date below indicates when it was last updated.

Effective date / 制定日: June 18, 2026