Imabari Castle is a rare sea castle built during the Edo period and is said to be one of Japan's three great water castles. At the time the castle was built, ships could enter the moat directly from the sea, making it a vital point for maritime transportation. The moat surrounding the castle is filled with seawater, where you can see sea bream, sea bass, and even sharks! It's also interesting to note that the water level changes with the ebb and flow of the tide.
