The Tobacco & Salt Museum introduces the history and culture of tobacco and salt which were once monopoly goods (in Japan). The permanent exhibition room on salt features easy-to-understand displays, such as on salts from around the world, the history of salt-making in Japan, and the roles of salt. Salt is indispensable for the survival of not only mankind, but also animals. This article discusses the importance of salt, one of the bounties of the sea, as well as its roles and how it’s produced and used.