The main armament of the "Kawachi" class consisted of four 50-caliber 12-inch 41st Year Type guns in two twin-gun turrets, one each fore and aft of the superstructure, and eight 45-caliber 12-inch 41st Year Type guns mounted in four twin-gun turrets, two on each side of the superstructure. Their secondary armament comprised ten 45-caliber 41st Year Type guns, mounted in casemates in the sides of the hull. Eight 40-caliber quick-firing (QF) 41st Year Type guns and a dozen 40-caliber QF 12-pounder 41st Year Type guns provided defense against torpedo boats. Four other 12-pounder guns were used as saluting guns. In addition, the battleships were fitted with five submerged torpedo tubes, two on each broadside and one in the stern.