washington u.s. defense secretary ash carter call japanese counterpart saturday express regret american work u.s. military base japan arrest suspicion dump body japanese woman case okinawa spark protest tokyo could add resentment large u.s. military presence island japanese long upset crimes commit americans also likely stir anti-u.s. sentiment president barack obama visit japan next week call japanese defense minister gen nakatani carter extend sincere apologies victim family friends defense department spokesman peter cook say statement also express sympathies people japan statement say 32-year-old american work base okinawa admit abandon corpse 20-year-old japanese woman comment whether kill okinawa police spokesman say early week pentagon say man contractor name pentagon statement say defense department would cooperate japanese government investigation work prevent similar incidents obama go japan group seven summit also become first u.s. president visit hiroshima city destroy u.s. atomic bomb 71 years ago world war two okinawa site bloody world war two battle host bulk u.s. military force base japan since war u.s. installations take 18 percent island early year u.s. serviceman station okinawa arrest suspicion rap woman infamous post-war case involve americans okinawa three american servicemen rap 12-year-old girl 1995. u.s defense secretary apologize american charge japanese woman 's death