 During the mid @-@ 1930s reconstruction the torpedo tubes were removed and the Vickers two @-@ pounders were replaced by twenty license @-@ built Hotchkiss 25 mm Type 96 light AA guns in 10 twin @-@ gun mounts . This was the standard Japanese light AA gun during World War II , but it suffered from severe design shortcomings that rendered it a largely ineffective weapon . According to historian Mark Stille , the twin and triple mounts " lacked sufficient speed in train or elevation ; the gun sights were unable to handle fast targets ; the gun exhibited excessive vibration ; the magazine was too small , and , finally , the gun produced excessive muzzle blast " . These 25 @-@ millimetre ( 0 @.@ 98 in ) guns had an effective range of 1 @,@ 500 – 3 @,@ 000 metres ( 1 @,@ 600 – 3 @,@ 300 yd ) , and an effective ceiling of 5 @,@ 500 metres ( 18 @,@ 000 ft ) at an elevation of 85 degrees . The maximum effective rate of fire was only between 110 and 120 rounds per minute because of the frequent need to change the fifteen @-@ round magazines . In addition the forward pair of 14 cm guns in the forecastle were removed at this time and the maximum elevation of the remaining guns was increased to + 30 degrees . 
 During the mid @-@ 1930s reconstruction the torpedo tubes <a href='uninflect' title='1'><mark>were</mark></a> removed and the Vickers two @-@ pounders <a href='uninflect' title='2'><mark>were</mark></a> replaced by twenty license @-@ built Hotchkiss 25 mm Type 96 light AA guns in 10 twin @-@ gun mounts . This was the standard Japanese light AA gun during World War II , but it suffered from severe design shortcomings <a href='null_relcl' title='3'><mark>that</mark></a>rendered it a largely ineffective weapon . According to historian Mark Stille , the twin and triple mounts " lacked sufficient speed in train or elevation ; the gun sights <a href='uninflect' title='4'><mark>were</mark></a> unable to handle fast targets ; the gun exhibited excessive vibration ; the magazine was too small , and , finally , the gun produced excessive muzzle blast " . These 25 @-@ millimetre ( 0 @.@ 98 in ) guns had an effective range of 1 @,@ 500 – 3 @,@ 000 metres ( 1 @,@ 600 – 3 @,@ 300 yd ) , and an effective ceiling of 5 @,@ 500 metres ( 18 @,@ 000 ft ) at an elevation of 85 degrees . The maximum effective rate of fire was only between 110 and 120 rounds per minute because of the frequent need to change the fifteen @-@ round magazines . In addition the forward pair of 14 cm guns in the forecastle <a href='uninflect' title='5'><mark>were</mark></a> removed at this time and the maximum elevation of the remaining guns was increased to + 30 degrees . 
During the mid @-@ 1930s reconstruction the torpedo tubes was removed and da Vickers two @-@ pounders was replaced by twenty license @-@ built Hotchkiss 25 mm Type 96 light AA guns in 10 twin @-@ gun mounts . This was the standard Japanese light AA gun during World War II , but it suffered from severe design shortcomings rendered it a largely ineffective weapon . According to historian Mark Stille , the twin and triple mounts " lacked sufficient speed in train or elevation ; tdagun sights was unable to handle fast targets ; thdaun exhibited excessive vibration ; thedagazine was too small , and , finally , the gun produced excessive muzzle blast " . These 25 @-@ millimetre ( 0 @.@ 98 in ) guns had an effective range of 1 @,@ 500 – 3 @,@ 000 metres ( 1 @,@ 600 – 3 @,@ 300 yd ) , and an effective ceiling of 5 @,@ 500 metres ( 18 @,@ 000 ft ) at an elevation of 85 degrees . The daimum effective rate of fire was only between 110 and 120 rounds per minute because of the frequent gotta change the fifteen @-@ round magazines . In addition the forward pair of 14 cm guns in the forecastle was removed at this time and the maximum elevation of the remaining guns was increased to + 30 degrees .