Yamakraft (hereinafter referred to as “we,” “us,” or “our”) respects the privacy of users (hereinafter “Users”) of our website (yamakraft.com) and our mobile applications and games (collectively, the “Services”). This Privacy Policy explains how we collect, use, and protect personal information.
- 1. Operator Information
- 2. Scope of This Policy
- 3. Information We Collect
- 4. Purposes of Use
- 5. Disclosure to Third Parties
- 6. Cookies and Analytics Tools
- 7. User Rights
- 8. International Data Handling
- 9. Children’s Privacy (Users Under Age 13)
- 10. Data Retention Period
- 11. Security
- 12. Changes to This Privacy Policy
- 13. Contact Us
1. Operator Information
| Item | Details |
|---|---|
| Business Name | Yamakraft |
| Address | 3-16-12 Roppongi, Roppongi KS Building 5F, Minato-ku, Tokyo 106-0032, Japan |
| Contact Email | info@yamakraft.com |
| Website | https://yamakraft.com |
2. Scope of This Policy
This Privacy Policy applies to all of the following services:
- Our website (https://yamakraft.com and its subdomains)
- All mobile applications we develop and provide (iOS / Android)
- All computer games we develop and provide (PC / Steam, etc.)
- Communications via contact forms, email, etc.
If a specific app or game has unique data handling practices, those will be described in that product’s individual privacy policy, which applies in conjunction with this Policy.
3. Information We Collect
3-1. Information Collected via the Website
| Type | Content | Collection Method |
|---|---|---|
| Inquiry Information | Name, email address, inquiry content | Contact submissions |
| Comment Information | Comment content, IP address, browser info | Automatically collected when posting |
| Access Logs | IP address, browser type, visit timestamp, referrer URL | Server logs / analytics tools |
| Cookies | Session identifiers, preference settings | Browser |
3-2. Information Collected via Mobile Apps and Games
Our apps and games do not collect personal information by default. User data is stored locally on the device and is not transmitted to external servers.
However, in limited cases, we may collect the minimum necessary information:
| Type | Content | Purpose |
|---|---|---|
| Crash Reports | App crash details, device model, OS version | Bug fixes and quality improvement (standard Apple/Google features, anonymized) |
| App Store / Google Play Purchase Info | Platform-issued transaction IDs, purchase timestamps | Purchase verification and restoration (no personally identifying information included) |
| iCloud / Google Drive Backups | User settings and recorded data (optional) | Backup functionality (used only at the user’s discretion) |
Data handling specific to each app is described on each app’s store page and individual privacy policy.
4. Purposes of Use
We use the collected information for the following purposes:
- Responding to inquiries
- Providing and operating the Services
- Improving the Services and developing new features
- Addressing bugs and incidents
- Preventing fraudulent use
- Complying with applicable laws
5. Disclosure to Third Parties
We will not disclose personal information to third parties except in the following cases:
- With the User’s consent
- When required by law
- When necessary to protect the life, body, or property of any person
- When necessary to provide information to service providers (hosting services, payment platforms, etc., who are subject to appropriate supervision)
6. Cookies and Analytics Tools
6-1. Use of Cookies
We use cookies on our website to improve user experience. Users can disable cookies through their browser settings, although some features may not work properly as a result.
6-2. Analytics
We may use analytics tools such as Google Analytics on our website. These tools use cookies to collect traffic data but do not collect personally identifiable information.
- Google Analytics Terms of Service: https://marketingplatform.google.com/about/analytics/terms/
- Opt-out: https://tools.google.com/dlpage/gaoptout
7. User Rights
Users have the following rights regarding their personal information:
- Right to access
- Right to rectify, supplement, or delete
- Right to suspend use
- Right to opt-out of disclosure to third parties
To exercise these rights, please contact us at the contact information in Section 13. We will respond within a reasonable period after verifying identity.
8. International Data Handling
8-1. Notice for EU/EEA Users (GDPR)
While our Services are based in Japan, we respect the following rights under the EU General Data Protection Regulation (GDPR) for users in the EU/EEA:
- Right of access, rectification, and erasure (right to be forgotten)
- Right to restriction of processing, right to data portability
- Right to object, rights related to automated decision-making
- Right to lodge a complaint with a supervisory authority
Legal basis: Provision of the Services, contractual performance, our legitimate interests, and User consent.
8-2. Notice for California Residents (CCPA)
Under the California Consumer Privacy Act (CCPA), California residents have the following rights:
- Right to know what personal information is collected and how it is used
- Right to request deletion of personal information
- Right to opt-out of the sale of personal information (we do not sell User personal information)
9. Children’s Privacy (Users Under Age 13)
We respect the requirements of the U.S. Children’s Online Privacy Protection Act (COPPA), Apple App Store Kids Category guidelines, and Google Play Designed for Families program.
9-1. Policy for Apps Designed for Children
For our apps targeting infants and young children (e.g., SenseTots, Yamakraft Blocks), we strictly adhere to the following:
- No collection of personal information (name, email, location, photos, contacts, etc.)
- No third-party advertisements
- No third-party analytics tools (Google Analytics, Firebase, etc.)
- No in-app purchases (or parental authentication required)
- No external links, or use of parental gates
- No social media sharing functions
9-2. Notice to Parents
When children under the age of 13 use our Services, we ask that a parent or guardian supervise their use. If we become aware that we have inadvertently collected information about a child, we will promptly delete it. Please contact us at the address in Section 13.
10. Data Retention Period
We retain collected information only for the period necessary to fulfill the purposes of use:
- Inquiry information: 3 years from completion of response
- Access logs: Up to 1 year from collection
- Local app data: Until the user uninstalls the app (managed by user)
If retention periods are mandated by law, we will follow those periods.
11. Security
We implement appropriate safety measures to prevent leakage, loss, or damage to collected personal information, including:
- Encryption of communications (HTTPS / TLS)
- Implementation of access controls
- Regular security audits
- Appropriate supervision of service providers
12. Changes to This Privacy Policy
We may update this Privacy Policy as necessary. We will notify Users of significant changes on our website.
13. Contact Us
For questions about this Policy or requests regarding personal information, please contact:
- Email: info@yamakraft.com
- Hours: Business days only; response may take several days
| Effective Date | March 22, 2026 |
|---|---|
| Last Updated | April 21, 2026 (Added operator information, mobile app section, COPPA, and GDPR/CCPA compliance) |
Operator: Yamakraft