kuroganegomon gate of imabari castle, shikoku, japan

1604 1980 ancient architecture asia attack battle besiege castle citadel clash culture defense defensive erected fight fort fortification fortress gate historical history imabari in invade island japan japanese keep kuroganegomon landmark landscape medieval military of old oriental protect reconstructed samurai shikoku siege sightseeing site stone strong stronghold structure takatora todo tower traditional travel turret wood wooden woodwork