Abstract
Nowadays, Information Systems have developed larger and more complex. As a result, it is too hard to explain how these information systems correlating to the firm's competitive advantage. At the same time, Information Technology (IT) becomes 'commodity'; therefore IT doesn't contribute to the firm's long term competitive advantage. On this paper, we research Seven-Eleven Japan which has excellent information systems, and denote the contribution of firm's competitive advantage from the "Path Dependency" perspective.