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年次報告書の訂正とその後のESG格付け引き下げ：ガバナンス次元に焦点を当てて

Annual Report Corrections and Subsequent ESG Rating Downgrades: Focusing on the Governance Dimension (原題)

Kwangtae Kim

Global Venture Research Institute📚 査読済 / ジャーナル2026-09-30#ESG経営インパクト: 資金調達対象セクター: cross_sector
DOI: 10.54794/enesg.2026.6.8.641
原典: https://doi.org/10.54794/enesg.2026.6.8.641

🤖 gxceed AI 要約

日本語

韓国の上場企業754社・3,764社年を対象に、年次報告書の訂正がその後のKCGSガバナンス格付け引き下げと関連するかを検証した研究。訂正企業は約4.0ポイント高確率でガバナンス格下げに見舞われる一方、環境・社会格付けでは有意な関係は見られなかった。訂正は財務報告だけでなくガバナンス評価におけるリスクシグナルとして解釈できると示唆する。

English

Using 3,764 firm-year observations of 754 Korean listed firms, this study tests whether annual report corrections predict subsequent KCGS governance rating downgrades. Correcting firms are about 4.0 percentage points more likely to be downgraded on governance, while no significant relation appears for environmental or social ratings. Corrections thus signal a common weakness in disclosure and oversight systems, not general performance decline.

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

📝 gxceed 編集解説 — Why this matters

日本のGX文脈において

SSBJ基準の開示や有報訂正が日本でも投資家の信頼性評価に直結しつつある中、訂正履歴を格付け・議決権行使の判断材料とする視点は日本企業の開示ガバナンス体制整備に示唆を与える。

In the global GX context

As ISSB/CSRD regimes raise scrutiny of disclosure reliability, this paper shows that restatements function as a forward-looking governance risk signal for ESG raters and investors—relevant to global debates on assurance and disclosure quality.

👥 読者別の含意

🔬研究者:訂正とESG格付けの因果的関連を実証した点で、開示品質と評価インフラの研究に新たな証拠を提供する。

🏢実務担当者:有報訂正の履歴がESG格付けや投資家評価に波及し得るため、開示プロセスの内部統制強化が実務課題となる。

🏛政策担当者:訂正開示のタイムリーな公表と評価機関による活用が、開示規制の実効性を高める点を政策設計に反映すべき。

📄 Abstract（原文）

This study examines whether disclosure quality weaknesses, identified ex post through annual report corrections, are associated with subsequent downgrades in corporate governance ratings assigned by the Korea Institute of Corporate Governance and Sustainability (KCGS). Analyzing 3,764 firm-year observations of 754 listed firms, we find that correcting firms are approximately 4.0 percentage points more likely to experience a downgrade in their subsequent governance rating. This relation holds after controlling for the prior rating level and firm characteristics, as well as in firm fixed effects models. In contrast, no significant relation is observed for environmental or social ratings, suggesting that corrections and governance ratings capture a common weakness in firms' disclosure and oversight systems rather than general performance deterioration. The difference in coefficients relative to the governance pillar, however, is significant at the 5% level only for the social pillar. The relation persists when correcting firms are restricted to those whose corrections were disclosed before the rating announcement and is not confined to particular types of corrections. Corrections involving material content show a significant relation, but the difference by materiality is not statistically significant. This study contributes to the literature by showing that annual report corrections can be interpreted as a risk signal not only for financial reporting but also for governance evaluation.

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