This study is watched the historic change of second personal pronouns. Concretely. Analysis is focused the creation and extinction of second personal pronouns and historic change social factors. The creation and extinction of second personal pronouns is very frequently occurred in Japanese The social factors have a influence on second personal pronouns. There are three important points. First. the historic change of second personal pronouns reflects how to understand about the group. Second, the historic change of second personal pronouns reflects how to understand about the individual. Third, the second personal pronouns reflect the social change.