Does a Director Breach the Duty of Oversight by Approving an Agenda Item After a Board Risk AI Has Flagged Warning Signs?

The Anchor in Actual Precedent and the Question Posed by the Future Synthetic Case

Supreme Court Decision 2021Da279347 decided May 12, 2022 (shareholder derivative suit (damages)) squarely addresses the following question: are outside directors of a large construction company that failed to prevent repeated bid rigging liable for damages for breach of the duty of oversight?

The Supreme Court's core conclusions may be summarised as follows. The Supreme Court held that a director must, beyond his or her own assigned duties, monitor the representative director and the directors in charge of business affairs to ensure that they comply with statutes. Outside directors are no exception. A director who leaves the matter unattended despite grounds to suspect illegality is therefore liable for damages under Article 399 (1) of the Commercial Act. In a large company, the content of this duty includes establishing and operating an internal control system that, for business carrying high legal risk, identifies the applicable regulations and enables reporting and correction when a violation is discovered. The Court found no error in the lower court's conclusion that a code of ethics and training alone did not amount to a control mechanism, or in its finding, based on past sanctions, statements about industry practice and similar evidence, of a breach arising from the absence of internal control. In limiting the amount of damages, the court may take into account the nature of the business, the circumstances of the breach, the director's contribution and whether the director gained any benefit, defects in the organisation, and other factors. The determination of the limitation ratio is respected as a matter for the fact-finding court unless it is markedly contrary to equity. The operative part reads: "All appeals are dismissed. The costs of appeal arising from the plaintiffs' appeal are to be borne by the plaintiffs, and those arising from the defendants' appeal are to be borne by the defendants." The judgment's mode of reasoning is the statement of requirements (following existing precedent).

Taking the doctrine of the actual judgment above as its anchor, this research pair applies it to a hypothetical case. At a 2032 board meeting of a listed company, an internal control AI displayed warnings of insufficient collateral and liquidity risk concerning short-term loans to an affiliate, but the outside directors approved the loans after hearing only management's oral explanation. The pair compares, step by step, which requirements operate unchanged in that case and which give rise to new gaps in proof.

Sources for this section: Supreme Court Decision 2021Da279347 decided May 12, 2022 — official text of the judgment, National Law Information Center

The Structure of the Issues Set by the Holdings and the Referenced Provisions

The framework of the holdings as set out in the judgment is as follows. [1] Whether a director of a stock company bears a duty to monitor and supervise the representative director and the directors in charge of business affairs so that they perform their duties in compliance with statutes (affirmative), and whether the same applies to directors who are not engaged in the company's ordinary business, such as outside directors (affirmative) / Whether a director of a stock company who, intentionally or negligently, breaches the duty of oversight and leaves the business execution of the representative director or a director in charge of business affairs unattended despite grounds to suspect that it is illegal is liable for damages under Article 399 (1) of the Commercial Act for the loss the company thereby sustains (affirmative) [2] The content of the duty of oversight borne by directors where, in a large company, it is unavoidable that only the representative director or some directors take exclusive charge of their respective fields of expertise under the internal allocation of duties / The cases in which outside directors and others who do not take charge of business execution may be found to have breached the duty of oversight [3] Whether, where a director is liable to the company for damages for an act in violation of statutes or the like or for neglect of duties, the amount of damages may be limited in consideration of all relevant circumstances, including the circumstances of the breach of duty (affirmative), and whether, in such cases, the finding of facts relating to the grounds considered for limiting the amount of damages and the determination of the limitation ratio fall within the exclusive authority of the fact-finding court (affirmative in principle)

The referenced provisions to be read together in this case are: [1] Article 382 (2) and (3) and Article 399 (1) of the Commercial Act, and Article 681 of the Civil Act; [2] Article 382 (2) and (3) and Article 399 (1) of the Commercial Act, and Article 681 of the Civil Act; and [3] Article 399 (1) of the Commercial Act, Article 396 of the Civil Act, and Articles 202 and 432 of the Civil Procedure Act. The first step is to separate, among the constituent elements or the requirements for the creation of rights laid down in the wording of these provisions, how far the domain of statutory interpretation extends and where the domain of case-specific fact-finding begins.

In relation to prior precedent, this judgment stands in the position of following existing precedent. Reading it alongside the referenced precedents ([1][2] Supreme Court Decision 2017Da222368 decided November 11, 2021 (Gong2022Sang, 4) / [3] Supreme Court Decision 2007Da34746 decided October 11, 2007 (Gong2007Ha, 1750)) shows how the Court rearranged the factual elements of the specific case while maintaining the outer limits of the existing doctrine.

Sources for this section: Supreme Court Decision 2021Da279347 decided May 12, 2022 — official text of the judgment, National Law Information Center

Analysis of the Summary of the Supreme Court Judgment and Its Key Holding Sentences

The core of the summary of the judgment stated by the Supreme Court is as follows. [1] Where a director, intentionally or negligently, commits an act in violation of statutes or the articles of incorporation or neglects his or her duties, the director is jointly and severally liable to the company for damages (Article 399 (1) of the Commercial Act). Because a director of a stock company has a duty to monitor not only his or her own assigned duties but also the business execution of the representative director and the directors in charge of business affairs, the director must not only comply with statutes personally but also bears a duty to monitor and supervise the representative director and the other directors in charge of business affairs so that they, too, perform their duties in compliance with statutes. This duty of monitoring and supervision applies equally to directors who are not engaged in the company's ordinary business, such as outside directors. Accordingly, where a director of a stock company, intentionally or negligently, breaches the duty of oversight and leaves the business execution of the representative director or a director in charge of business affairs unattended despite grounds to suspect that it is illegal, the director is liable for damages under Article 399 (1) of the Commercial Act for the loss the company thereby sustains. [2] The specific content of a director's duty of oversight may differ greatly depending on the company's size and organisation, its line of business, statutory regulation, its business situation and its financial condition. In particular, even where, in a highly specialised large company with a high degree of division of labour, it is unavoidable that only the representative director or some directors take exclusive charge of their respective fields of expertise under the internal allocation of duties, every director must, at least with respect to business in which high legal risk is foreseeable in light of the company's purpose and size, the nature of its business, statutory regulation and the like, perform the duty of oversight by establishing and ensuring the operation of an internal control system of a form that systematically identifies all applicable laws and regulations, manages compliance with them, and, when a violation is discovered, enables immediate notification or reporting so that corrective measures can be devised. However, outside directors and others who do not take charge of the company's business execution may be found to have breached the duty of oversight in cases such as where they make no effort, such as urging the establishment of an internal control system, even though no internal control system has been established at all, or where, even though an internal control system has been established, they ignore and leave unattended grounds to suspect that it is not being properly operated. [3] Where a director is liable to the company for damages by having, intentionally or negligently, committed an act in violation of statutes or the articles of incorporation or neglected his or her duties, in determining the scope of such damages the amount of damages may be limited in light of the ideal of the damages system, namely the equitable apportionment of loss, by taking into account all relevant circumstances, including the content and nature of the business concerned, the circumstances of the director's breach of duty and the manner of the act in breach, the objective circumstances involved in the occurrence and expansion of the company's loss and their extent, the director's ordinary contribution to the company, whether the director gained any benefit from the act in breach, and whether there were defects in the company's organisational structure or whether a risk management system had been established. In such cases, the finding of facts relating to the grounds considered for limiting the amount of damages and the determination of the limitation ratio fall within the exclusive authority of the fact-finding court, unless they are markedly unreasonable in light of the principle of equity.

In particular, the passage in the judgment that directly supports the conclusion is the following: "[1] Where a director, intentionally or negligently, commits an act in violation of statutes or the articles of incorporation or neglects his or her duties, the director is jointly and severally liable to the company for damages (Article 399 (1) of the Commercial Act). Because a director of a stock company has a duty to monitor not only his or her own assigned duties but also the business execution of the representative director and the directors in charge of business affairs, the director must not only comply with statutes personally but also bears a duty to monitor and supervise the representative director and the other directors in charge of business affairs so that they, too, perform their duties in compliance with statutes"

This sentence is not merely an abstract declaration. It serves as the reference point for confirming the doctrinal premise on which the lower court's judgment was upheld.

Sources for this section: Supreme Court Decision 2021Da279347 decided May 12, 2022 — official text of the judgment, National Law Information Center

Comparison Table: Elements of the Actual Judgment and the Synthetic Case

The table below sets out the elements of judgment drawn from the 2021Da279347 judgment and compares them, side by side, with the structure of the record in the synthetic case.

Sources for this section: Supreme Court Decision 2021Da279347 decided May 12, 2022 — official text of the judgment, National Law Information Center

Two Competing Doctrinal Readings of the Synthetic Case

In the synthetic case (the hypothetical case in which, at a 2032 board meeting of a listed company, an internal control AI displayed warnings of insufficient collateral and liquidity risk concerning short-term loans to an affiliate, but the outside directors approved the loans after hearing only management's oral explanation), the first reading emphasises the outward result and the economic and functional effects, and would extend the doctrine of existing precedent (2021Da279347) without modification. On this view, even if the technical means or the contractual form has changed, the risk the norm seeks to prevent and the legal interest it seeks to protect remain the same.

The second reading counters, invoking the strict limits of the principle of legality in criminal law (nullum crimen sine lege) and of private autonomy and the numerus clausus of rights, that the requirements of awareness, agreement and control on the part of the actor presupposed by the 2021Da279347 judgment cannot be applied by analogy to algorithms or distributed-ledger structures. The argument is that, within the wording of the current provisions, it is difficult to attribute liability without legislative supplementation.

Sources for this section: Supreme Court Decision 2021Da279347 decided May 12, 2022 — official text of the judgment, National Law Information Center

Remaining Questions and Conditions for Re-examination

The follow-up question that remains after reading this judgment is as follows: when all directors are held liable on the ground of an absence of internal control, how far can the scope of an outside director's oversight extend?

It is also clear which further materials or precedents, once accumulated, should prompt a re-examination of this analytical framework. It should be revisited when the question whether control mechanisms were functioning arises again in records such as the bid rigging in the Four Major Rivers Project, the Yeongju Dam bid rigging, and the Incheon Subway bid rigging.

This text is a research analysis prepared by comparing, as of October 15, 2026, the original text of Supreme Court Decision 2021Da279347 decided May 12, 2022, as published on the National Law Information Center, with the referenced provisions. It does not substitute for the conduct of litigation by any particular party or for legal advice.

Sources for this section: Supreme Court Decision 2021Da279347 decided May 12, 2022 — official text of the judgment, National Law Information Center