Privacy Policy
Last Updated: September 4, 2026
Japan Tree Works ("we," "our," or "the Service Provider") recognizes the protection of personal information as an important responsibility and is committed to appropriate handling and protection in accordance with this Privacy Policy.
1. Scope of Application
This Privacy Policy applies to the following services:
- Our website (https://www.japan-treeworks.com)
- Mobile applications provided by us (JTW Rigging Simulator, JTW Swing Simulator, JTW Load Transfer Simulator, etc.)
- Browser extensions provided by us (JTW Fullpage Capture, etc.)
- macOS applications provided by us (such as JTW Photo Utility)
- Other services provided by us
2. Information We Collect
2.1 Mobile Applications
Our mobile applications operate based on the following principles:
- No Personal Information Collection: Our apps do not collect any personally identifiable information such as names, email addresses, phone numbers, location data, or contacts.
- User-Selected Data Only: Future versions may provide functionality to use photos or illustrations explicitly selected by the user as background images within the app. Such data is stored only on your device and is never transmitted to external servers. We do not access data that users do not explicitly select.
- Local Storage Only: App settings, preset information, and user-selected images are all stored only on your device.
- Offline Operation: All features work offline and do not require an internet connection.
- No Third-Party Services: We do not use any third-party services including advertising, analytics tools, or other external services.
- No Access to Other Device Information: We do not access other device information such as microphone, call logs, SMS, etc.
2.2 Browser Extension (JTW Fullpage Capture)
Our browser extension operates based on the following principles:
- Information Processed: The extension processes the content of the web page displayed at the moment you explicitly initiate a capture, solely for the purpose of generating an image.
- No Transmission or Collection: Web page content, browsing history, and any other information are never transmitted to, collected by, stored on, or shared with our servers or any third party.
- On-Device Processing: Capturing, stitching, and saving are performed entirely on your device, and the resulting image is saved only to the download location you have specified.
- Scope of Access: The extension accesses only the tab that is active at the moment you click the toolbar icon. It does not monitor browsing continuously or gather information in the background.
- No Third-Party Services: We do not use any third-party services including advertising, analytics tools, or other external services.
- No Account Required: No registration or sign-in is required.
2.3 macOS Application (JTW Photo Utility)
Our macOS application operates under the following policies:
- Information processed: Only the photo files you explicitly select or drag & drop are processed, solely for conversion (removing EXIF and other metadata, resizing, renaming).
- No external transmission or collection: Photos, location data and other metadata, or any other information are never transmitted to, collected by, stored on, or provided to our servers or any third party. The application contains no networking functionality at all.
- On-device processing: All processing is completed on your Mac. Converted photos are saved only to the destination you choose. Your original photos are never modified.
- Settings: App preferences (such as default resize options) are stored only on your Mac.
2.4 Website
On our website, we may collect the following information:
- Information entered in contact forms (name, email address, inquiry content, etc.)
- Anonymized information for access analysis (Google Analytics)
3. Purpose of Use
3.1 Mobile Applications
Data generated and stored within the app (settings, presets, user-selected images, etc.) is used only for the following purposes:
- Providing app functionality (displaying calculation results, saving settings, displaying background images, etc.)
- Data retention on your device
- Improving app usability (use of custom background images selected by users, etc.)
This data is never transmitted to the Service Provider or any third parties. All data is stored only on your device.
3.2 Browser Extension (JTW Fullpage Capture)
Web page content processed by the extension is used solely for the following purposes:
- Generating the image (PNG) you requested
- Saving the generated image to your device
Processed content is never transmitted to us or to any third party. Generated images are stored only on your device.
3.3 macOS Application (JTW Photo Utility)
Photos processed by the application are used only for the following purposes:
- Performing the conversion you request (removing EXIF and other metadata, resizing, renaming)
- Saving the converted photos to the destination you choose
Processed photos and metadata are never transmitted to us or to any third party.
3.4 Website
Information collected on our website is used for the following purposes:
- Responding to inquiries
- Analysis for service improvement
- Website improvement
4. Third-Party Disclosure
The Service Provider will not provide your personal information to third parties except in the following cases:
- When we have your consent
- When required by law
- When necessary to protect the life, body, or property of an individual and it is difficult to obtain your consent
5. Use of Cookies
5.1 Mobile Applications
Our mobile applications do not use cookies.
5.2 Browser Extension
Our browser extension does not use cookies.
5.3 macOS Application
Our macOS application does not use cookies.
5.4 Website
On our website, we may use cookies for the following purposes:
- Access analysis (Google Analytics)
- Improving website usability
You can refuse to accept cookies through your browser settings, but in that case, some services may not be available.
6. Use of Google Analytics
Our website uses Google Analytics to analyze access patterns. Google Analytics uses cookies to analyze website usage. This information is anonymized and does not identify individuals.
For more information about Google Analytics terms of use and privacy policy, please refer to:
7. Security
The Service Provider takes the following measures to prevent leakage, loss, or damage of personal information:
- Local storage of application data (no external transmission)
- SSL/TLS encrypted communication for website
- Appropriate access management
8. Children's Privacy
The Service Provider's services are intended for individuals aged 13 and over. The Service Provider does not knowingly collect personal information from children under 13.
9. Changes to Privacy Policy
The Service Provider may change this Privacy Policy in response to changes in laws and regulations or changes in service content. The revised Privacy Policy will become effective when posted on this page.
10. Contact Us