 The ships ' secondary armament of twenty 50 @-@ caliber 14 @-@ centimeter guns was mounted in casemates on the upper sides of the hull and in the superstructure . The latter guns had a maximum elevation of + 20 degrees and the former could elevate to + 25 degrees which gave them ranges of 15 @,@ 800 meters ( 17 @,@ 300 yd ) and 17 @,@ 000 meters ( 19 @,@ 000 yd ) respectively . Each gun could fire a 38 @-@ kilogram ( 84 lb ) high @-@ explosive projectile at a rate up to 10 rounds per minute . Anti @-@ aircraft defense was provided by four 40 @-@ caliber 3rd Year Type 3 @-@ inch AA guns in single mounts . The 3 @-@ inch ( 76 mm ) high @-@ angle guns had a maximum elevation of + 75 degrees , and had a rate of fire of 13 to 20 rounds per minute . They fired a 6 kg ( 13 lb ) projectile with a muzzle velocity of 680 m / s ( 2 @,@ 200 ft / s ) to a maximum height of 7 @,@ 500 meters ( 24 @,@ 600 ft ) . The ship was also fitted with eight 53 @.@ 3 @-@ centimeter ( 21 @.@ 0 in ) torpedo tubes , four on each broadside , two above water and two submerged . They used the 6th Year Type torpedo which had a 203 @-@ kilogram ( 448 lb ) warhead of Shimose powder . It had three settings for range and speed : 15 @,@ 500 meters ( 17 @,@ 000 yd ) at 26 knots ( 48 km / h ; 30 mph ) , 10 @,@ 000 meters ( 11 @,@ 000 yd ) at 32 knots ( 59 km / h ; 37 mph ) , or 7 @,@ 000 meters ( 7 @,@ 700 yd ) at 37 knots ( 69 km / h ; 43 mph ) . 
