Chart Playback Data Tool Terms of Use

Terms consent version: 2026-08-07
Effective date: 2026-08-07
Last updated: 2026-08-07

Article 1 Applicability and Relationship with the Web App

These Terms of Use apply to all users of this tool.

This tool may be used whether or not you use the Chart Playback web app. A Chart Playback account or login is not required.

This tool and the Chart Playback web app are related services, but are provided as separate services.

Article 2 Purpose of This Tool

This tool is intended to retrieve stock price and other data for the symbols and date ranges specified by users, and save the data as CSV files on the users' devices.

This tool assists with the retrieval of stock price data and is not intended for any of the following:

- Investment advice or trading recommendations
- Forecasts of future prices or price movements
- Guarantees of profits or other results
- Recommendations of particular symbols

Any decisions and actions using retrieved data are the responsibility of the user.

Article 3 Eligible Users and Scope of Use

This tool may be used by individuals who agree to these Terms of Use, including those who do not use the Chart Playback web app. A Chart Playback account or login is not required.

This tool is intended for personal, non-commercial, and non-business use by individuals for their own purposes. This includes use for personal investment decisions, analysis, decision-making practice, research, or recordkeeping.

Use by corporations, organizations, or sole proprietorships in the course of business, use for customers or other third parties, and use in services that provide data to third parties are outside the intended scope.

Users are responsible for confirming and complying with the terms of use, rights, and restrictions established by data providers and other third parties for retrieved data.

The ability to use this tool does not mean that retrieved data may be freely copied, published, sold, redistributed, or used commercially.

Article 4 Data Sources

This tool uses the third-party open-source software yfinance to retrieve stock price and other data.

yfinance is unofficial software. The operator has no partnership, cooperation, endorsement, or agency relationship with Yahoo, the providers of Yahoo Finance, the developers of yfinance, or other data providers.

Changes in data-provider specifications, failures, access restrictions, discontinuation of service, or similar circumstances may make all or part of this tool unavailable.

When using retrieved data, users are responsible for confirming and complying with the latest terms of use, rights, and restrictions established by data providers and other third parties.

The names, copyright notices, and license terms of third-party software can be reviewed in the third-party license notices included with this tool or on the official website.

Article 5 Accuracy of Data and Related Matters

The operator does not guarantee any of the following with respect to data obtainable through this tool:

- Accuracy
- Completeness
- Timeliness
- Continued availability of retrieval
- Fitness for a particular purpose
- The absence of omissions, duplicates, or errors

Changes in data-provider specifications, failures, access restrictions, discontinuation of service, market closures, changes in symbol information, or other reasons may prevent data retrieval or result in data that differs from what was expected.

Users should compare data with other information sources as necessary before using it.

Article 6 Data Storage and Transmission

CSV files retrieved through this tool are saved to the location specified by the user on the user's own device.

This tool does not transmit or store the symbol code, date range, symbol name entered by the user, or retrieved CSV data on servers managed by the operator.

However, to retrieve data, information corresponding to the symbol code, date range, and similar information specified by the user may be transmitted to the data provider.

Users are responsible for managing, backing up, deleting, and providing saved files to third parties.

Article 7 Prohibited Conduct

Users must not use this tool to engage in any of the following:

1. Conduct that violates laws or the terms of use of third parties
2. Selling, redistributing, publicly transmitting, or publishing retrieved data without the necessary rights or permission
3. Using this tool as a commercial service, business service, or data-provision service for third parties
4. Obtaining large volumes of data or making continuous data requests in a short period through automation or other methods
5. Circumventing or attempting to circumvent access restrictions imposed by data providers
6. Installing this tool on a server and retrieving data on behalf of third parties in response to their requests
7. Placing an excessive burden on this tool or third-party services
8. Using this tool for illegal or improper purposes, or for purposes that infringe the rights of others
9. Any other conduct that the operator considers inappropriate for providing this tool

Article 8 User Responsibilities

Users are responsible for managing their environment for using this tool, their communication environment, storage location, and retrieved data.

Before using data retrieved through this tool, users must confirm the contents, applicable symbols, date range, and whether any data is missing.

Users are responsible for transactions, analysis, decisions, and other actions taken through use of this tool or based on retrieved data.

Article 9 Disclaimer and Limitation of Liability

This tool is provided as it exists at the time of provision. The operator does not guarantee that this tool will operate on all devices, operating systems, communication environments, or future environments.

Users may suffer damage due to use of or inability to use this tool, omissions, errors, delays, or failures to save retrieved or stored data, changes in data-provider specifications, failures, discontinuation of service, or other circumstances related to this tool.

If the operator is legally liable for damages in connection with this tool and the operator's negligence is limited to ordinary negligence, the scope of compensation is limited to ordinary and direct damages actually incurred by the user. In such cases, the operator is not liable for special damages, indirect damages, lost profits, or other similar damages.

The limitation of liability in the preceding paragraph does not apply when damage is caused by the operator's intentional misconduct or gross negligence, or when limitation of liability is not permitted under applicable law.

Article 10 Changes to and Discontinuation of This Tool

The operator may change the functions, supported environments, data retrieval methods, or content of this tool as necessary.

The operator may suspend all or part of this tool without prior notice due to changes in data-provider specifications, failures, discontinuation of service, security issues, or other circumstances.

The operator does not guarantee continued provision of this tool.

Article 11 Changes to the Terms of Use

The operator may change these Terms of Use in response to changes in laws, the functions of this tool, conditions of data providers, operating policies, or other necessary circumstances.

When making changes that materially affect users' rights or obligations, including changes to the scope of use, prohibited conduct, data storage or transmission, fees, whether account registration is required, disclaimers or limitations of liability, governing law, or court jurisdiction, the operator will update the Terms consent version, display the revised Terms of Use, and request explicit renewed consent from users.

If a user does not agree to a change that requires renewed consent, the user may not use this tool after the change.

Corrections of typographical errors, consistency of wording, clarification of explanations that do not change meaning, updates to contact information or links, and updates to third-party license notices that do not materially affect users' rights or obligations may not require renewed consent.

For changes requiring renewed consent, a user's failure to take action or continued launching of this tool alone will not be regarded as consent.

Article 12 Third-Party Software

This tool includes yfinance and other open-source software provided by third parties.

Each software program is subject to its respective license terms. The names, copyright notices, and license terms of covered software can be reviewed in the third-party license notices included with this tool or on the official website.

Article 13 Governing Law and Court Jurisdiction

Japanese law applies as the governing law to these Terms of Use and matters concerning this tool.

Court jurisdiction for disputes concerning this tool is governed by the Code of Civil Procedure and other applicable laws.

If other mandatory provisions apply by law, those provisions take precedence.

Article 14 Contact

For inquiries regarding this tool, please contact:

Chart Playback operator
Email address: contact@chartplayback.com
