Terms of Service

About This Site

This site is created and run by an individual.
Anyone is free to use the tools and content we provide.

Using Our Tools

• You are welcome to feature our tools and screens in YouTube videos, blogs, and similar content.
• Monetized use is also OK.
• No prior contact or permission is needed. Crediting the site name as your source is appreciated (optional).

More concretely, here is what we have in mind:

• Fine — screenshots or recordings of the tools in your videos or articles; showing a tool on a live stream; showing it in a class or training session; linking to this site; posting a shared result link
• Please don't — copying the text of a page onto your own site; copying the source code to publish the same tool; embedding a tool as part of your own site or app

If you are unsure, please get in touch — the answer is usually yes.

Use in Educational Settings

Schools, cram schools, and other educational institutions are welcome to use our tools freely.
Use them in classes, incorporate them into teaching materials, or use them as teaching aids.
No application or permission is required.

Prohibited Actions

To keep the site running smoothly, please refrain from the following:

• Unauthorized access or placing excessive load on the site
• Reproducing or redistributing page text or source code without permission (quoting or showing the screens is fine)
• Actions that trouble other users or third parties

About the Tools and Content

• We strive for accuracy, but we do not guarantee the content or results.
• If you find a bug, we would appreciate a report via the contact page.
• We are not liable for any bugs, data loss, or damages arising from use of the site.
• Tools and their specifications may change or be discontinued without notice.

Copyright

The content on this site — text, images, tools, and more — belongs to the site operator or its rightful owners.
Please do not reproduce or redistribute the text or the source code itself without permission (quoting and screenshots that showcase the screens are free to use, as described under "Using Our Tools" above).
* Monetizing videos or blogs that use our tools is fine, but please refrain from commercial uses of the site name or logo (such as selling merchandise or using them in app names).

Third-Party Services

Some features use external services. Our contact page uses Google Forms and X (formerly Twitter), and the tools that have share buttons use X.
Please check each provider's policies for their privacy practices and terms of use. What is sent from this site, and when, is described in our Privacy Policy.

Other

These terms may be revised as needed.
Please check this page for the latest version.

Language

These Terms of Service are provided in Japanese and English.The Japanese version is the authoritative text; in the event of any discrepancy between the two versions, the Japanese version prevails.