Nakatsu Castle, with its moats fed by tidal sea water from the Seto Inland Sea, is one of Japan's three so-called "seaside castles". The others are Takamatsu Castle in Kagawa and Imabari Castle in Ehime. Nakatsu Castle sits on the Yamakuni River delta, about half a kilometer south of the river's mouth, the tidal river … Continue reading Nakatsu Castle: provincial river guardian