archive . org / web / 2 0 0 7 0 9 2 9 1 8 0 4 1 3 / http :// www . ef c video . com / E conom ics USA / ▁ ▁http :// www . lear ner . org / resources / series 7 9 . html ▁ ▁Category : 1 9 8 6 ▁American ▁television ▁series ▁deb uts ▁Category : 1 9 8 0 s ▁American ▁television ▁series ▁Category : P BS ▁original ▁programming ▁Category : T ele vision ▁series ▁by ▁the ▁An nen berg ▁Foundation <0x0A> </s> ▁The ▁ ▁was ▁the ▁principal ▁manufact urer ▁of ▁gun pow der , ▁explos ives , ▁am mun ition ▁and ▁art illery ▁shell s ▁for ▁the ▁Imperial ▁Japanese ▁Navy . ▁ ▁It ▁was ▁located ▁in ▁the ▁town ▁of ▁ Ō no ▁( now ▁part ▁of ▁the ▁city ▁of ▁Hir ats uka ), ▁Kan ag awa ▁Pref ect ure , ▁Japan . ▁ ▁History ▁The ▁Hir ats uka ▁Naval ▁Am mun itions ▁Ar sen al ▁was ▁initially ▁established ▁as ▁a ▁private ▁joint ▁vent ure ▁enter prise ▁by ▁the ▁foreign ▁fir ms ▁of ▁Arm strong ▁Whit worth , ▁Nobel , ▁and ▁V ick ers ▁in ▁September ▁ 1 9 0 5 . ▁All ▁three ▁companies ▁were ▁very ▁active ▁in ▁the ▁supply ▁of ▁weapon ry ▁for ▁war ships ▁to ▁the ▁early ▁Imperial ▁Japanese ▁Navy . ▁The ▁plant ▁was ▁purchased ▁by ▁the ▁Navy ▁in ▁April ▁ 1 9 1 9 , ▁and ▁came ▁under ▁the ▁oper ational ▁control ▁of ▁the ▁Imperial ▁Japanese ▁Navy