Japanese automakers Nissan and Honda have announced plans for a merger that would catapult them to a top position in an industry that's in flux as it transitions away from its reliance on fossil fuels.

Honda's CEO said it was "difficult" to explain why Nissan would make a good business partner. Analysts believe that Honda's ideal partner for a merger would be a more "healthy and financially sound company.

Honda's shares went up by as much 17% when local markets opened on Tuesday.

Japanese automakers Honda and Nissan will attempt to merge and create the world’s third-largest automaker by sales as the industry undergoes dramatic changes in its transition away from fossil fuels.

Honda Motor Co. and Nissan Motor Co. plan to merge under a holding company with the top executives chosen by Honda in a historical reshuffling of Japan’s auto industry meant to keep the country’s second- and third-largest players competitive amid a global onslaught of new competitors and technologies.

Facing extreme competitive pressure from the rise of Chinese EV makers, the Nos. 2 and 3 Japanese automakers turn to each other to build strength.

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.

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,