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プライバシーポリシー

Privacy Policy

SINQWELL (hereinafter referred to as “the Company”) establishes the following Privacy Policy (hereinafter referred to as “this Policy”) regarding the handling of users’ personal information in the services provided on this website (hereinafter referred to as “the Service”).

Article 1 (Personal Information)

“Personal Information” refers to “personal information” as defined in the Personal Information Protection Act, which is information about living individuals that can identify a specific individual by name, date of birth, address, telephone number, contact information, and other descriptions contained in such information, as well as data relating to appearance, fingerprints, and voiceprints, and information that can identify a specific individual from that information alone (personal identification information), such as the insurer number on a health insurance card.

Article 2 (Method of Collecting Personal Information)

The Company may ask for personal information such as name and email address when users register to use the Service.

Account deletion is possible within the app. Records of shared use may remain for consistency purposes but will be anonymized so that individuals cannot be identified.

Article 3 (Purpose of Collecting and Using Personal Information)

The purposes for which we collect and use personal information are as follows:

  • To provide app functionality
  • To respond to user inquiries (including identity verification)
  • To send emails regarding new features, updates, campaigns, and other services we provide for services the user is currently using
  • To contact users as necessary for maintenance, important announcements, etc.
  • To identify users who violate the Terms of Use or attempt to use the service for fraudulent or improper purposes, and to deny them access
  • To allow users to view, modify, delete their own registered information, and view their usage status
  • To bill users for usage fees for paid services
  • For purposes incidental to the above purposes

Article 4 (Change in Purpose of Use)


The Company shall change the purpose of use of personal information only when it is reasonably deemed to be related to the purpose of use prior to the change.

In the event of a change in the purpose of use, the Company shall notify the user of the changed purpose by the method specified by the Company or publish it on this website.

Article 5 Google Calendar Integration

To enhance user convenience, this application provides Google Calendar integration functionality.

This application complies with the Google API Services User Data Policy, including the Limited Use requirements.

Information We Collect

Only when users explicitly grant permission for integration, we access the following information:

  • Permission to create, edit, and delete events in Google Calendar
  • Information about created calendar events (event title, date/time, participant information)

Purpose of Use

The collected information is used solely for the following purposes:

  • Automatic registration of lesson schedules
  • Automatic deletion of calendar events when lessons are deleted
  • Updating calendar events when lesson information is modified
  • Supporting users’ schedule management

Information Management and Storage

  • The collected information is not used for any purpose other than those stated above
  • We do not provide, share, or sell information to third parties
  • Calendar data is managed only on the user’s device and Google’s servers
  • Our application does not store Google Calendar data on our servers
  • The app accesses Google API in real-time only for creating, editing, and deleting calendar events

Data Protection Mechanisms

  • Communication Encryption: All data transmissions are protected using HTTPS/TLS encryption
  • Access Control: OAuth 2.0 authentication ensures access only to data explicitly authorized by users
  • Data Minimization: We request and process only the minimum necessary data
  • Secure Storage: Data on user devices is protected by the operating system’s standard security mechanisms
  • Access Token Management: Access tokens for Google Calendar are securely stored on the device and never shared with third parties

Data Retention Period

  • Data retrieved from Google Calendar is held in memory only temporarily during app usage for processing purposes and is immediately discarded after processing is complete
  • No persistent storage is performed
  • When users disconnect Google Calendar integration, the app immediately stops accessing the calendar

User Rights

Users have the following rights:

  • Disconnect Integration: You can disconnect the integration at any time from the app settings
  • Data Deletion: Even after disconnecting, events already registered in the calendar must be deleted by you directly in Google Calendar
  • Data Access Verification: The scope of data accessed by the app can be verified in your Google Account security settings
  • Deletion Request: If you have any requests regarding data deletion, please contact us through the inquiry form below

Contact Information

For inquiries regarding Google Calendar integration, please contact us through our Contact Form.

Article 6 (Change of Purpose of Use)

The Company may change the purpose of use of personal information only when it is reasonably recognized that the purpose of use is related to that before the change.

When the purpose of use has been changed, the Company shall notify users of the changed purpose by the method prescribed by the Company or publish it on this website.

Article 7 (Provision of Personal Information to Third Parties)

The Company will not provide personal information to third parties without the prior consent of users, except in the following cases. However, this excludes cases permitted by the Personal Information Protection Act and other laws and regulations.

When it is necessary for the protection of the life, body, or property of an individual and it is difficult to obtain the consent of the person

When it is particularly necessary for improving public health or promoting the sound growth of children and it is difficult to obtain the consent of the person

When it is necessary to cooperate with a national agency, local government, or an individual or entity entrusted by them in executing affairs prescribed by laws and regulations, and obtaining the consent of the person may impede the execution of such affairs

When the Company has announced or publicly disclosed the following matters in advance and has notified the Personal Information Protection Commission:

The purpose of use includes provision to third parties

Items of data provided to third parties

Means or methods of provision to third parties

Stopping the provision of personal information to third parties at the request of the person

Method of accepting requests from the person

Notwithstanding the provisions of the preceding paragraph, in the following cases, the recipient of such information shall not be considered a third party:

When the Company outsources all or part of the handling of personal information to the extent necessary to achieve the purpose of use

When personal information is provided as a result of business succession due to merger or other reasons

When personal information is to be used jointly with a specific person, and the user has been notified in advance, or has been put in a state where the user can easily know, of that fact, the items of personal information to be used jointly, the scope of joint users, the purpose of use of the users, and the name or title of the person responsible for the management of such personal information

Article 8 (Disclosure of Personal Information)

When the Company is requested by a person to disclose personal information, the Company will disclose it to the person without delay. However, if disclosure falls under any of the following, the Company may not disclose all or part of it, and if the Company decides not to disclose it, the Company will notify the person to that effect without delay. A fee of 1,000 yen will be charged for each disclosure of personal information.

When there is a risk of harming the life, body, property, or other rights and interests of the person or a third party

When there is a risk of significant hindrance to the proper execution of the Company’s business

When it would violate other laws and regulations

Notwithstanding the provisions of the preceding paragraph, in principle, information other than personal information, such as history information and characteristic information, will not be disclosed.

Article 9 (Correction and Deletion of Personal Information)

Users may request the Company to correct, add, or delete (hereinafter referred to as “correction, etc.”) personal information held by the Company if such personal information is incorrect, by following the procedures determined by the Company.

If the Company receives a request under the preceding paragraph from a user and determines that it is necessary to respond to the request, the Company will make the correction, etc. of the personal information without delay.

When the Company makes corrections, etc. based on the provisions of the preceding paragraph, or when the Company decides not to make corrections, etc., the Company will notify the user without delay.

Article 10 (Suspension of Use of Personal Information)

If the Company is requested by a person to suspend or erase the use of personal information (hereinafter referred to as “suspension of use, etc.”) on the grounds that it is being handled beyond the scope of the purpose of use or that it has been acquired by fraudulent means, the Company will conduct the necessary investigation without delay.

Based on the results of the investigation in the preceding paragraph, if the Company determines that it is necessary to respond to the request, the Company will suspend the use, etc. of the personal information without delay.

When the Company suspends use, etc. based on the provisions of the preceding paragraph, or when the Company decides not to suspend use, etc., the Company will notify the user without delay.

Notwithstanding the preceding two paragraphs, if it is difficult to suspend use, etc., such as when it costs a large amount, and alternative measures necessary to protect the rights and interests of users can be taken, these alternative measures will be taken.

Article 11 (Changes to the Privacy Policy)

The content of this Policy may be changed without notice to users, except for matters stipulated separately by laws and regulations and this Policy.

Unless otherwise specified by the Company, the revised Privacy Policy will take effect from the time it is posted on this website.

Article 12 (Contact for Inquiries)

For inquiries regarding this Policy, please contact us through the inquiry form.