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 has migrated from the old version (V1) to the new version (V2), and the old version (V1) was discontinued on June 1, 2026. Your subscription will be carried over after migrating to V2. Please see the changes between V1 and V2 here.