JPX Market Innovation & Research: Enhancement Of J-Quants API Data Service - CSV Data Delivery And Addition Of Minute Bar And Tick Data

JPX Market Innovation & Research, Inc. (“JPXI”) announces that, following the renewal of the J-Quants API implemented in December 2025, it has introduced CSV-format data delivery and added minute bar and tick data for equities to its retail-oriented service, J-Quants API, as of January 19, 2026.

Through this enhancement, users can now obtain data not only via APIs but also in bulk using CSV files, as well as access higher-frequency stock price data. This expansion enables a wider range of data analysis and learning use cases for individual investors.

1. Major Enhancements Implemented in December 2025

(1) Launch of J-Quants API V2 (Version 2)

JPXI launched J-Quants API V2, renewing the existing API (V1).
This update improves the usability and scalability of the service.

(2) Transition to API Key Authentication

J-Quants API V2 adopts API key-based authentication, replacing the previous token-based method.
This simplifies authentication procedures and facilitates automated and programmatic usage.

(3) Optimization of API Response Data

Column names in API responses have been optimized and shortened to reduce data transfer volume and improve processing efficiency. There are no changes to the content of the data provided.

(4) Continued Availability of V1 API

The existing V1 API will remain available during a transition period.
The schedule for its discontinuation will be announced at a later date.

(5) Launch of the Official MCP Server

In response to increasing demand for AI-assisted development, JPXI has launched an official MCP server based on the J-Quants API specifications.
This server supports API usage in accordance with the latest specifications and assists with migration from V1 to V2.

(6) Support for Google Sign-In

To improve user convenience, Google account sign-in has been added in addition to email-based authentication.

2. Major Features Added in January 2026

(1) CSV Data Delivery

JPXI has introduced a bulk data delivery function in CSV format for various datasets previously available only via APIs.
Both historical data and daily updated data can now be obtained in CSV format.

This feature is available to users subscribed to the Light Plan or higher.

(2) Provision of Minute Bar and Tick Data for Equities

JPXI has begun providing minute-level bar data and tick data for equities.
Please note that this data does not include derivatives such as futures.

This data is offered as an optional add-on service for users subscribed to the Light Plan or higher, at a fee of JPY 5,500 per month (tax included).

3. Future Developments

JPXI will continue to enhance and expand J-Quants API in order to support market analysis and learning activities by individual investors.

For further details and the latest information, please visit the J-Quants official website: