▁of ▁Def ense . ▁Since ▁the ▁conclusion ▁of ▁the ▁Japan - US ▁Security ▁Tre aty , ▁heavy ▁emphas is ▁was ▁placed ▁on ▁inter oper ability ▁among ▁defense ▁relations . ▁In ▁order ▁to ▁perform ▁this ▁software ▁maintenance ▁and ▁ins pection , ▁M its ub ishi ▁Electric ▁Corporation ▁and ▁other ▁major ▁companies ▁of ▁the ▁M its ub ishi ▁Group ▁established ▁M its ub ishi ▁Space ▁Software ▁through ▁a ▁joint ▁invest ment ▁with ▁TR W . ▁ ▁As ▁the ▁company ' s ▁main ▁operations , ▁it ▁conduct s ▁and ▁offers ▁the ▁research ▁and ▁development , ▁design , ▁manufact uring , ▁s elling , ▁and ▁other ▁services ▁related ▁to ▁various ▁fields ▁dealing ▁with ▁information ▁sciences , ▁including ▁Space ▁Systems , ▁A viation ▁Systems , ▁Def ense ▁Systems , ▁Bio in format ics , ▁Information ▁Communic ation ▁Systems , ▁ ▁Dis aster ▁Pre vention ▁& ▁Environment al ▁Systems , ▁System ▁Integr ation , ▁and ▁ASP / products . ▁ ▁History ▁ ▁The ▁company ' s ▁history ▁started ▁in ▁ 1 9 6 2 ▁as ▁a ▁joint ▁vent ure ▁between ▁M its ub ishi ▁Corporation ▁of ▁Japan ▁and ▁TR W ▁of ▁the ▁United ▁States . ▁After ▁ending ▁the ▁agreement ▁with ▁TR W ▁and ▁changing ▁the ▁company ' s ▁name , ▁it ▁has ▁proceeded ▁to ▁expand ▁and ▁advance ▁into ▁new ▁fields . ▁▁▁ 1 9 6 2 , ▁March : ▁With ▁M its ub ishi ▁Electric ▁at ▁the ▁center , ▁the ▁M its ub ishi ▁Group ▁companies ▁and ▁TR W ▁of ▁the ▁United ▁States , ▁as ▁a ▁joint ▁vent ure