Terakoya.AI
Legal

Privacy Policy

Terakoya.AI Co., Ltd. ("the Company") sets out this Privacy Policy ("this Policy") for how it handles personal information and other information about users of the Terakoya desktop app, this website (terakoya.ai), its training and courses, and its other services (together, "the Services").

Article 1 (Personal Information)

"Personal information" means personal information as defined in Japan's Act on the Protection of Personal Information ("the APPI"): information about a living individual that can identify that person, such as a name or email address.

Article 2 (Your Data)

  1. The notes, files and chats you create and keep in Terakoya ("your data") are stored where you choose: Google Drive, OneDrive, Amazon S3 or your own computer.
  2. Your questions to AI, and the parts of your data used to answer them, go from your computer straight to the AI provider you chose or subscribe to (such as OpenAI, Anthropic or Google), or are processed only on your computer.
  3. None of this passes through the Company's servers, and the Company does not receive your data. The storage and AI providers handle it under their own terms and privacy policies.

Article 3 (Information the Company Collects)

The Company collects the following. It does not hold bank account or credit card numbers.

  1. Enquiries and demo requests: your name, company, email address, the content of your enquiry and anything else you send.
  2. Contracts and billing: the company name, the contact person's name and details, the number of licences and other information needed to manage the contract and invoice.
  3. Feedback from the app: the message, the email address to reply to, the organisation's name, app details (version, OS, AI in use, language) and any attached screenshots.
  4. Anonymous usage data, only if you agree to send it: the app version, OS, the kind of AI and note storage in use, and counts and fixed choices such as how often a screen is opened. It never includes note titles or contents, questions, answers, file names, people's names, email addresses or the organisation's name. It is recorded under a random ID made for each computer, and IP addresses are not passed on.
  5. Update checks and downloads: connection records such as the IP address, time and app version.
  6. Training and courses: participants' names, organisations, contact details and other information needed to register and run them.

Article 4 (Purposes of Use)

The Company uses this information to:

  1. provide, run and improve the Services;
  2. answer enquiries and run demos and training;
  3. manage contracts and invoice fees;
  4. investigate and fix problems reported through feedback;
  5. send necessary notices about new features, updates, maintenance and other important matters;
  6. prevent use that breaks the Terms of Service or is otherwise improper; and
  7. carry out purposes incidental to the above.

Article 5 (Information Sent to Other Companies)

The Services send information about users to the following companies:

  1. PostHog, Inc. (PostHog Cloud, stored in the EU): the anonymous usage data in Article 3(4), to count how the app is used and improve it. It is sent only if you choose to send it, and you can stop it at any time in the app's settings. An organisation's manager can also turn it off for the whole organisation.
  2. Resend (Plus Five Five, Inc.): enquiries and demo requests in Article 3(1) and the feedback in Article 3(3), to deliver them by email to the Company's staff.
  3. Anthropic, PBC: the message, app details and screenshots from feedback, to investigate and fix problems. The email address and organisation's name are not sent. Screenshots are deleted when the investigation ends, and within one day at the latest.
  4. Cloudflare, Inc.: connection records from update checks and downloads, from relaying feedback, anonymous usage data and enquiries, and from serving this website.
  5. Google LLC (Google Fonts): the visitor's IP address and browser details, to display this website's fonts.

Some of these companies are outside Japan, for example in the United States.

Article 6 (Provision of Personal Information to Third Parties)

  1. Except where the APPI or other laws allow it, the Company will not provide personal information to third parties without the person's prior consent.
  2. Despite the above, the recipient is not a third party when:
    • the Company entrusts all or part of the handling of personal information to others as needed to achieve the purposes of use (including the companies in the previous Article); or
    • personal information is provided as part of a business succession through a merger or otherwise.

Article 7 (Disclosure of Personal Information)

  1. When requested by an individual to disclose their personal information, the Company shall disclose it to the individual without delay. However, if disclosure would fall under any of the following, the Company may choose not to disclose all or part of the information, and if a decision not to disclose is made, the individual will be notified without delay. No fee is charged for disclosure.
    • When there is a risk of harm to the life, body, property, or other rights and interests of the individual or a third party
    • When there is a risk of significant hindrance to the proper conduct of the Company's business
    • When it would violate other laws and regulations
  2. Notwithstanding the provisions of the preceding paragraph, information other than personal information, such as browsing history and characteristic information, shall not be disclosed as a general rule.

Article 8 (Correction and Deletion of Personal Information)

  1. Users may request the Company to correct, add, or delete (hereinafter referred to as "corrections, etc.") their personal information held by the Company if such information is inaccurate, through procedures established by the Company.
  2. If the Company receives a request as described in the preceding paragraph and determines that it is necessary to comply with the request, the Company shall make the corrections, etc. to the relevant personal information without delay.
  3. The Company shall notify the user without delay when corrections, etc. have been made based on the provisions of the preceding paragraph, or when a decision has been made not to make corrections, etc.

Article 9 (Suspension of Use of Personal Information)

  1. If the Company is requested by an individual to suspend or delete the use of their personal information (hereinafter referred to as "suspension of use, etc.") on the grounds that the information is being handled beyond the scope of the purposes of use or that it was acquired through improper means, the Company shall conduct the necessary investigation without delay.
  2. If, based on the results of the investigation described in the preceding paragraph, it is determined that the request should be complied with, the Company shall suspend the use, etc. of the relevant personal information without delay.
  3. The Company shall notify the user without delay when suspension of use, etc. has been carried out based on the provisions of the preceding paragraph, or when a decision has been made not to suspend use, etc.
  4. Notwithstanding the preceding two paragraphs, in cases where suspension of use, etc. would involve significant costs or is otherwise difficult to implement, and alternative measures can be taken to protect the rights and interests of the user, the Company shall take such alternative measures.

Article 10 (Security Measures)

To prevent personal information from being leaked, lost or damaged, the Company takes necessary and appropriate measures, including rules for handling it, limits on who can access it, staff training, and checks when using companies outside Japan. The Company will describe these measures without delay on request.

Article 11 (Changes to this Policy)

  1. Except as otherwise required by law or provided in this Policy, the Company may change this Policy. Important changes will be announced in advance on this website or in the app.
  2. Unless the Company states otherwise, the changed Policy takes effect when it is posted on this website.

Article 12 (Contact)

For questions about this Policy or how personal information is handled, please contact:

  • Company: Terakoya.AI Co., Ltd.
  • Representative Director: Paul Li
  • Email: [email protected]

The Company's address will be provided without delay on request.

Last updated: November 9, 2026

The Japanese version of this Policy prevails.