Abstract
The history and present status of the conservation of Hibiscus hamabo Siebold et Zucc., which grows around salt marshes and is considered a semi-mangrove plant, were studied. Recently, several localities of this species have been designated as town, city, and prefectural natural monuments. The species is listed in the regional Red Data Book for most prefectures where it occurs. Citizens and government departments have performed numerous conservation activities. The conservation activities of citizens have varied, although some have incorrectly involved transplanting H. hamabo from other regions. It is important that conservation activities are carried out not only by citizens but also by government departments and researchers.
