Privacy Policy

Last Updated: December 27, 2025

Introduction

Mochiyori Seisan (the "Service") values the protection of users' personal information. This Privacy Policy explains how the Service collects, uses, and protects information.

1. Information We Collect

1.1 Information Provided by Users

The Service may collect the following information:

  • Event name and description
  • Participant nicknames (real names are not required)
  • Family composition information (number of adults and children)
  • Payment amounts and descriptions
  • Schedule candidate information

1.2 Automatically Collected Information

The following information may be automatically collected when using the Service:

  • IP address
  • Browser type and version
  • Device type
  • Access date and time
  • Usage data (page views, clicks, etc.)

2. Purpose of Use

Collected information is used for the following purposes:

  • Providing, maintaining, and improving the Service
  • Executing settlement calculations and providing event management functions
  • Responding to user inquiries
  • Analyzing usage patterns and improving the Service
  • Preventing unauthorized use and maintaining security

3. Information Sharing

The Service will not share users' personal information with third parties except in the following cases:

  • With user consent
  • When disclosure is required by law
  • When necessary to protect the life, body, or property of a person and it is difficult to obtain the person's consent

Information entered within an event (participant names, payment information, etc.) is shared with other users who have access to the same event.

4. Data Storage and Deletion

4.1 Data Storage Location

The Service uses Google Firebase (provided by Google LLC, USA) to store data. Data is stored in an encrypted state with appropriate security measures in place.

4.2 Data Deletion

Event organizers can delete events they have created and their related data at any time. Deleted data will be promptly removed from servers, except for backups.

5. Use of Cookies

The Service uses cookies and local storage to improve service convenience. These technologies are used for session management and saving user settings. You can disable cookies in your browser settings, but some features may not work properly.

6. Security

The Service implements industry-standard security measures to protect users' information. However, complete security cannot be guaranteed for communications over the internet.

7. Use of External Services

The Service uses the following external services:

  • Firebase Authentication (Google LLC): Anonymous authentication
  • Cloud Firestore (Google LLC): Database
  • Vercel (Vercel Inc.): Hosting service

These services have their own privacy policies.

8. Children's Privacy

The Service does not intentionally collect personal information from children under 13 years of age. Parents are requested to supervise when their children use this service.

9. Changes to Privacy Policy

The Service may change this Privacy Policy as necessary. In the event of significant changes, we will notify users on the Service.

10. Contact

If you have any questions or concerns about this Privacy Policy, please contact us at:

* Contact information will be added in the future.