Cool is a word of American English that has been integrated into the vocabulary of numerous languages around the globe. Today it is a term most often used in advertising trendy commodities, or, more generally, in promoting urban lifestyles in our postmodern age. But what is the history of the term "cool?" When has coolness come to be associated with certain modes of contemporary self-fashioning? On what grounds do certain nations claim a privilege to be recognized as "cool?" These are some of the questions that served as a starting-point for a comparative cultural inquiry which brought together specialists from American Studies and Japanese Studies, but also from Classics, Philosophy and Sociology.