Nissan Motor shares surged over  20% on Wednesday following a Nikkei report about a potential merger with Honda Motor. The report suggests the automakers plan to operate under a holding company, with Mitsubishi Motors also potentially joining. While Honda shares slipped 3%, Mitsubishi closed over 19% higher. Nissan denied confirming any integration plans but acknowledged exploring collaborations. Combined sales of the three companies could exceed 8 million vehicles annually, placing them among the world's largest automakers but still trailing Toyota and Volkswagen.