Ruins of a Sengoku-period mountain castle in Izu-no-kuni City, said to have been built around 1493 by Ise Shinkuro (Hojo Soun), who transformed from a Muromachi shogunate retainer into a Sengoku warlord. It served as an important stronghold of the Odawara Hojo clan and is known for a 100-day siege during Toyotomi Hideyoshi\'s 1590 siege of Odawara. Now maintained as Shiroyama, the summit offers pa…
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