Japan Railways Group
The Japan Railways Group , more commonly known as , consists of seven for-profit companies ( "kabushiki gaisha" ) that took over most of the assets and operations of the government-owned Japanese National Railways on April 1 , 1987 . 
<triplet> Japan Railways Group <subj> Japanese National Railways <obj> replaces <triplet> Japanese National Railways <subj> Japan Railways Group <obj> replaced by <subj> for-profit <obj> instance of