merger (of companies, towns, etc.);  combination;  union;  amalgamation;  consolidation;  coalition
 complications (in an illness)
 the great municipal mergers of the Heisei era;  series of large-scale municipal mergers carried out between 1995 and 2010 under the temporary Special Mergers Law
 merger of towns and villages
 combined company;  merged company
 surviving company (in a merger)
 absorbed company;  merged corporation