Japan’s second- and third-largest automakers hope the $50 billion deal would help them catch up with Tesla and China’s BYD in electric vehicles and advanced software.

Currently, Honda is an independent OEM, albeit one with strong links to General Motors. Meanwhile, Nissan currently forms one part of an alliance, together with France's Renault and the also-Japanese Mitsubishi. But the Renault-Nissan alliance has not been entirely smooth.

Honda and Nissan have officially confirmed the rumors that they're pursuing a merger. Both would still operate under their brands but with a new joint holding company as parent. If Nissan-controlled Mitsubishi also came on board,