Netscape became a NASDAQ-listed company a mere record-breaking three years with sales approaching 100 million dollars. However, firms like Microsoft Corporation took ten years to reach the 100 million dollar mark. Two start-ups may have had contrasting growth patterns, and this difference reflects distinct management styles that are so crucial to a firm’s growth. However, existing research has involved very little studies undertaken from this point of view. Our research, analyzes the growth patterns through case studies in Japan, and explores what factors lie behind contrasting patterns of growth. It also seeks to determine what factors affect the growth and success of high-tech start-ups.