Built in: 1572 by Satomi Yoshihiro
Class: Ruins
Okamoto castle was built by Okamoto clan. Then, Satomi Yoshihiro asks Okamoto to give this castle to protect his land against Hojo clan of Odawara in 1572.
Yoshihiro ordered his son, Yoshiyori to protect this castle. It is surrounded by the hard cliffs and has a great view of Tokyo Bay.