đź’ˇ This document is reference information translated by ChatGPT. The original version is in Japanese.
Last updated: January 25, 2026
Yoshiyuki Koyanagi has established the following Personal Information Protection Policy, and by constructing a framework for personal information protection along with a steadfast commitment to its importance, he promotes the safeguarding of personal information.
Yoshiyuki Koyanagi maintains your personal information accurately and up-to-date. To prevent unauthorized access, loss, damage, alteration, or leakage, he implements the necessary measures—such as maintaining and thoroughly managing the security system and its oversight framework—and enforces strict safety protocols for the secure handling of personal information.
The personal information entrusted to us by our customers is used solely as anonymized statistical data and only when necessary for improving the app.
Yoshiyuki Koyanagi properly manages the personal information entrusted by customers and will not disclose it to any third party except in the following cases:
To ensure both the accuracy and the security of personal information, Yoshiyuki Koyanagi has implemented comprehensive security measures.
If you wish to inquire about, modify, or delete your personal information, we will verify your identity and respond accordingly.
Yoshiyuki Koyanagi complies with the applicable Japanese laws and other relevant regulations regarding the personal information in his possession, and he will review and improve this policy as appropriate.
When you start using the app and choose Google Sign-In, the app accesses only the following Google user data:
The app uses your name and email address only to auto-fill the in-app inquiry form. This data is not used for analytics, advertising, marketing, or any other purpose.
The app does not share Google user data with any third parties.
Your name and email address are stored on your device to support auto-fill. They are not stored on a developer-managed server. If you submit an inquiry, the submitted content (including your name and email address) is transmitted to the developer for the purpose of responding to your inquiry.
Local data used for auto-fill remains on your device until you remove the app or clear the app data. Inquiry submissions are retained only as long as needed to respond to your request and are then deleted. If you would like your data deleted, please contact us using the in-app inquiry form.