As ESG funds have grown rapidly over the past decade, so too have concerns over greenwashing risk and the integrity of ESG-related claims made to investors. This report examines how major jurisdictions — including the United States, the European Union, Singapore, and Australia — have responded through ESG fund naming rules and active enforcement, and identifies a critical gap in Korea, where regulators have introduced only standalone ESG fund disclosure standards, without adopting substantive minimum portfolio composition requirements or ESG-specific enforcement standards. The report calls on Korea's regulators to move beyond disclosure standards toward more coherent rulemaking and enforcement to effectively combat ESG fund greenwashing.