島とう司しMeanings1nounisland governorHistorical title for the head of an island administration, especially in pre-war Japan. Not a modern political term.戦せん前ぜんの南なん洋よう群ぐん島とうでは、島とう司しが行ぎょう政せいを担たん当とうしていた。In the pre-war South Seas Mandate, island governors were in charge of administration.