The purpose of this study was to examine the social background characteristics of Japan entrepreneurs through the research data, “Personal history(personal statements, resume) of entrepreneurs”. The analysis results of this study can be summarized as follows : First, the time when Japan entrepreneurs were born ranged from 1900 to 1909. The ancestors of entrepreneurs were engaged in agriculture and their fathers were in commercial business(merchant). Second, the household condition of Japan entrepreneurs were good in case that their ancestors were engaged in agriculture and their father's occupation was a merchant. Third, as to the motivation of start-up company, Japan entrepreneurs started their business to succeed in life. The study showed that their ancestors were engaged in agriculture and the occupation of their father was merchant. Fourth, the educational background of Japan entrepreneurs was widely distributed when their ancestors were not in agriculture field and their father's job was a merchant. Fifth, in terms of the type of Japan businessmen, a lot of professional managers could be seen when their ancestor's social status was farmer and their father's occupation was a merchant. The result of this study can be concluded that the type of Japan entrepreneurs is different from their family backgrounds. Also, this study provided an opportunity to newly recognize the social background of Japan entrepreneurs.