Privacy Policy

Article 1 (Introduction)

This website, "supinatchi4 web" (hereinafter referred to as "the Site"), places great importance on protecting users' personal information and has established the following Privacy Policy.

Last updated: March 10, 2026 (JST)

Article 2 (Advertisement Delivery)

The Site uses third-party advertising services (such as Google AdSense). These ad network providers may use "Cookies" containing information about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. To learn more about disabling Cookies and Google AdSense, please review the "Google Privacy & Terms".

Article 3 (Use of Local Storage)

To improve your convenience (such as saving typing history, scores, study logs and settings, basic and scientific calculator history with angle mode preferences, calculator-wide display preferences, saved drafts for the percentage, fraction, unit converter, date, time, and age calculators, and Number Logic puzzle progress, display preferences, solver draft input, and generated puzzle seed data), the Site uses your browser's local storage feature (`localStorage`). This data is exclusively saved on your device and is never transmitted to or collected by our servers.

Article 4 (For Users in the EEA and California)

Users in the European Economic Area (EEA) and the UK may have data protection rights under regulations such as the GDPR, and users in certain US states may have privacy rights under laws such as the CCPA. On pages that use Google AdSense, Google's "Privacy & messaging" may display privacy notices related to advertising. The exact audience, content, and settings flow for consent or opt-out depend on Google's configuration and the user's environment. If you need to change or withdraw your choice, please use the Google privacy message shown on the Site, if available, or your browser's Cookie settings.

Article 5 (Disclaimer)

While we strive to provide accurate and up-to-date information on the Site, we do not guarantee its accuracy, safety, completeness, or fitness for a particular purpose. To the extent permitted by applicable law, and except in cases of willful misconduct or gross negligence by the operator, we are not responsible for damages arising from content published on the Site.

Article 6 (Changes to Privacy Policy)

The Site complies with Japanese laws and regulations applicable to personal information and will review and improve the contents of this policy as appropriate. The latest updated Privacy Policy will always be disclosed on this page.

Article 7 (External Transmission of Information)

In accordance with the Telecommunications Business Act of Japan and related global privacy standards, the Site uses the following third-party services to deliver personalized advertisements and measure their effectiveness, which involves transmitting information from your device to these providers:

[Provider] Google LLC (Google AdSense)
[Information Transmitted] Browsing history (URLs accessed, timestamps), Device information (IP address, Browser type, User Agent), Referrer data, and identifiers such as Cookies.
[Purpose] To deliver personalized advertisements and measure their effectiveness.
[Opt-out] Users can legally revoke their consent or manage ad personalization at any time by accessing the Google Consent Management settings or disabling Cookies through their browser.

[Provider] Cloudflare, Inc. (CDN/Hosting and Security Provider)
[Information Transmitted] Technical communication data required for web delivery, such as IP address, requested URL, and user agent.
[Purpose] Content delivery, site security (abuse protection), and maintaining availability/performance.
[Related Policy] Cloudflare Privacy Policy

Article 8 (Children's Privacy and COPPA)

While some tools on this Site (e.g., typing practice, English learning) have educational aspects, the Site is not designed as a service intentionally directed at "children under the age of 13" (under the US Children's Online Privacy Protection Act - COPPA) or equivalent ages. We do not knowingly collect personal information from individuals in these age groups. If minors use the Site, they must do so under the supervision and consent of a parent or guardian, including the configuration of consent management.

Article 9 (Contact)

If you have any questions about this Privacy Policy, please contact us at:
supinatchi4@gmail.com