It was built sometime in the early 16th century by Oda Nobuhide, the father of Oda Nobunaga in an attempt to protect his eastern borders against the aggressive Imagawa clan and is located at a strategic point on the highway connecting Mikawa Province with Owari Province.

[2] After the victory of Tokugawa Ieyasu at the Battle of Sekigahara in 1600, the castle was abandoned.

[3] Parts of the castle lie in ruins, including the remains of a well and a turret (yagura) which were discovered during archeological excavations.

The donjon, or tenshu, was reconstructed in 1987 out of ferro-concrete and holds a museum local history museum with ceramics, samurai armor and documents on the history of the castle.

Media related to Iwasaki Castle (Owari Province) at Wikimedia Commons