Obama Castle was a seaside-style castle located in what is now the city of Obama, Fukui Prefecture, Japan. During the Edo period, it was the headquarters of a junior branch of the Sakai clan, who were
Donjon foundation
Layout of Obama Castle - 1: main keep; 2: outer keep; 3: outermost keep; N: eastern keep; K: northern keep; H: main gate; Red: tower.