In recent years, the prevention of workplace bullying has emerged as a critical issue in international labor law. In response, Taiwan’s Ministry of Labor proposed amendments to the Occupational Safety and Health Act in March 2025 to regulate such conduct, with the Legislative Yuan passing the amendments on the third reading in December of the same year. Conversely, Japan recognized the gravity of workplace bullying at an earlier stage, amending the Act on the Comprehensive Promotion of Labor Policies in 2019 and supplementing it with detailed guidelines, thereby offering a valuable reference for Taiwan.<br>Accordingly, this article examines Taiwan’s current legal framework for addressing workplace bullying, reviews the development of relevant Japanese legislation, and proposes several normative recommendations. Key proposals include: (1) clearly defining workplace bullying as“conduct, other than sexual harassment or employment discrimination, committed in the performance of duties or by exploiting a position of superiority in the workplace, which infringes upon the physical or mental well-being of workers or harms the working environment”; (2) adopting a two-stage regulatory framework; (3) utilizing a soft law model as currently appropriate; (4) optimizing the Directions for Prevention of Unlawful Infringement in the Performance of Duties; (5) harmonizing the legal regimes for bullying prevention across public and private sectors; and (6) addressing customer harassment and consolidating related regulations into a comprehensive Workplace Harassment Prevention Act in the future. Ultimately, these measures aim to foster a friendly working environment and effectively realize the principle of decent work.