This study explored the possibility of individual identity change when individuals from two cultural groups (U.S. and Japan) interact in similar work environments. The research compared the author's work experience as a Japanese person working in the United States, published definitions of U.S. and Japanese cultures and working environments, and collected data from twelve U.S. and Japanese employees through questionnaires and follow-up interviews with two from each cultural group. The main question investigated was "What happens to the original identities of U.S. American and Japanese people after they have interacted with each other in a work setting?"