Honda has worked with GM in a series of collaborations that did not involve any exchange of corporate equity. In 1993, GM controlled Isuzu and signed a deal to supply its Rodeo to become Honda’s first SUV,

Rumors have it that Japan’s Ministry of Economy, Trade and Industry helped to influence the deal to avoid Foxconn's takeover of Nissan after METI endorsed the merger. This set off alarms for scorned ex-Nissan CEO Carlos Ghosn who is watching the unknown unfold from the sidelines.

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.

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.