Shimonoseki (下関市, Shimonoseki-shi) is a city located in Yamaguchi Prefecture, Japan. It is at the southwestern tip of Honshu, facing the Tsushima Strait and also Kitakyushu across the Kanmon Straits.Nicknamed the "Fugu Capital," it is known for the locally caught pufferfish and is the largest harvester of the pufferfish in Japan.As of October 1, 2010, the city has an estimated population of 280,386 and a population density of 391.52 persons per km². The total area is 716.14 km².