Data Correction History and Known issues

Data corrections are reflected by overwriting the existing data. Previous versions of the data are not retained, and diffs of corrected records are not provided.
We do not provide an API that notifies you when a data update or correction is complete, nor version numbers or ETags for the data.
Differential data retrieval using cursor is supported only for Financial Data, Financial Statement Data, and TDnet/Company Disclosure Index List (see Retrieving Differential Data Using Cursor).
If you need to reliably incorporate corrections, we recommend periodically re-fetching the data you need, taking the update timing of provided data into account.

Correction Date	Target API	Affected Period	Description
August 27, 2026	TDnet/Company Disclosure	August 29, 2022, November 2, 2023	Added missing disclosure index entries and disclosure documents (PDF/XBRL) for August 29, 2022 and November 2, 2023. The TDnet/Company Disclosure Index Bulk Download file has also been replaced with the corrected version.
August 5, 2026	Options (OHLC)	August 3, 2026	Corrected incorrect values recorded in the following fields for some Securities Options (EQOP) issues. Settle(Settlement Price) IV(Implied Volatility) Number of affected issues: 1,189 The daily bulk data file for August 3, 2026 has also been replaced with the corrected version.
June 29, 2026	Stock Prices (OHLC)	-	Following the addition of rights issues to the price adjustment targets, adjusted prices and trading volumes that were not correctly adjusted for past rights issues have been corrected. Affected issue codes: 17730, 33180, 37500, 38320, 38560, 45410, 57210, 63970, 69930, 77780, 94780
January 23, 2026	Outstanding Short Selling Positions Reported	November 7, 2013 - January 13, 2026	Minor errors caused by floating-point operations have been corrected, and the values have been normalized to four decimal places. ShrtPosToSO(Ratio of Short Positions to Shares Outstanding) PrevRptRatio(Ratio of Short Positions in Previous Reporting)
May 2, 2025	Financial Data (Summary only)	-	Corrected the data overall.

This section describes currently known issues and problems.

Date Added	Target API	Description	Workaround	Date Resolved
None