An Edo Period castle from the Kamakura Era, it is said that the first person to build the castle was Kobayakawa Tohira. It was seized by Hojo So-un in 1495, became the residence of a Mr. Okubo in the Edo Period, and towered over the city as a symbol of Odawara until its destruction in 1860. The outside of the current keep was restored in 1960 using fortified concrete, and the inside is an exhibition room for ancient books, paintings, amour, swords and other historical documents and artifacts. At its highest point the castle is 60m tall and affords a panoramic view of Sagami Bay - on a clear day, visitors can see as far as the Boso Peninsula.