About J-Quants API
Welcome to J-Quants API
J-Quants API is a service for individuals that distributes financial data such as historical stock prices and corporate financial information via API. Users can obtain financial data in a formatted and easy-to-analyze form.
For users who registered on or after December 22, 2025
Only the new version (V2) is available. Please see the Quick Start guide.
For users who have been using the service since before December 22, 2025
J-Quants API is currently migrating from the old version (V1) to the new version (V2). The old version (V1) is scheduled to be discontinued. While there will be a parallel operation period for the time being, we ask all users to migrate to the new version (V2) as soon as possible.