This study focuses on exploring the factors influencing why companies engage in greenhushing decisions in the cultural backgrounds of China and Republic of Korea. Structural equation modeling analysis indicates that in these two countries, reputational risk not only directly leads to corporate greenhushing behavior, but also exerts its influence through conservatism as a mediating factor. Reputational risk causes companies to exhibit conservatism, which in turn leads to the adoption of greenhushing behavior. Furthermore, tests for moderation effects revealed that, in the Chinese sample data, a transparent information disclosure mechanism has the ability to mitigate the impact of reputational risk on corporate greenhushing behavior, as well as to alleviate the influence of conservatism on corporate greenhushing behavior. In the South Korean sample data, a transparent information disclosure mechanism can moderate the impact of reputational risk on conservatism and corporate greenhushing behavior. Finally, the fsQCA method is tested to derive the different configurations and pathways that lead to the strong emergence of greenhushing behavior in companies in China and Republic of Korea, as well as to identify the most influential pathways. This study provides substantial theoretical support for further exploration of the causal mechanisms of corporate greenhushing behavior and promotion of cross‐cultural comparisons and learning in the international environmental management field. In addition, provides rich empirical support and theoretical guidance for corporate environmental management decision‐making and policy formulation. The findings highlight the further standardization and strengthening of transparent information disclosure mechanisms will be an important direction for future environmental policy development. [ABSTRACT FROM AUTHOR]