3 , ▁the ▁Ma iz uru ▁Naval ▁Ar sen al ▁was ▁officially ▁established . ▁ ▁Add itional ▁dry ▁do cks ▁were ▁completed ▁in ▁ 1 9 0 4 ▁and ▁ 1 9 1 4 . ▁When ▁the ▁No . ▁ 3 ▁dry ▁dock ▁was ▁completed ▁in ▁ 1 9 1 4 , ▁it ▁was ▁the ▁largest ▁in ▁Japan ▁at ▁the ▁time . ▁In ▁ 1 9 2 3 , ▁after ▁the ▁Washington ▁Naval ▁Tre aty , ▁there ▁were ▁discuss ions ▁within ▁the ▁Navy ▁Ministry ▁about ▁closing ▁the ▁facility , ▁and ▁it ▁was ▁largely ▁moth b alled ▁until ▁ 1 9 3 6 . ▁After wards , ▁it ▁re open ed ▁and ▁expanded , ▁building ▁ships , ▁aircraft ▁and ▁weapons ▁for ▁the ▁military . ▁It ▁special ized ▁mostly ▁in ▁destroy er - size ▁and ▁smaller ▁vessels . ▁ ▁Post ▁W W ▁II ▁In ▁the ▁post - World ▁War ▁II ▁period , ▁a ▁private ▁company , ▁I ino ▁Indust ries ▁Co . ▁Ltd ., ▁took ▁over ▁and ▁formed ▁the ▁Ma iz uru ▁Sh ip y ards . ▁ ▁In ▁ 1 9 6 3 , ▁the ▁name ▁was ▁changed ▁to ▁Ma iz uru ▁He avy ▁Indust ries . ▁In ▁ 1 9 7 1 , ▁it ▁was ▁merged ▁with ▁Hit achi ▁Z osen ▁Corporation . ▁In ▁ 2 0 0 2 , ▁Hit achi ▁Z osen ▁sp un ▁off ▁the ▁ship builder ▁into ▁a ▁joint ▁vent ure ▁with ▁J FE ▁Engineering ▁called ▁Universal ▁Sh ip building ▁Corporation . ▁Universal ▁Sh ip building ▁Corporation ▁and ▁I