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 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.