This document is a report submitted to Dr. Md. Khasro Miah by students Salman Zahir and Mahjabin Sharmin. The report examines the links between human resource management, business strategy, and firm performance among US, EU, and Japanese multinational corporations operating in South Asia. The report includes an abstract, introduction discussing MNCs from different regions investing in emerging markets, a theoretical framework, literature review on related research, hypotheses examining the relationships between variables, methodology section, and bibliography. The overall purpose is to analyze how business strategies shape HRM strategies and how these strategies impact firm performance across cultures.