JPXI Launches New Listed Shares Data Services

JPX Market Innovation & Research has rolled out two new datasets for J‑Quants Pro: Listed Shares Flash Data and Listed Shares Corporate Action Factors. The goal is simple. Give investors and corporate users faster access to share count information. Until now, Tokyo Stock Exchange published listed share numbers once a month, along with reasons for changes like stock splits, capital increases, or warrant exercises. That delay made it harder to react quickly to market moves.

The new datasets fix that. Listed Shares Flash Data shows daily share counts for all TSE-listed companies, including shares issued, listed, and used in index calculations. Corporate Action Factors track day-to-day changes and explain why they happened. Users can now monitor share movements daily, check figures for large shareholder reports or short-selling balances, and estimate market indicators like PBR more accurately.

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The updates reflect a wider push in Japanese markets for more real-time data. J‑Quants Pro users can subscribe monthly and choose specific datasets. This is aimed at corporate clients. Individual investors have separate access via the J‑Quants API.