The news comes after Mitsubishi was plunged into crisis following bombshell revelations that it has been cheating on fuel-economy tests for years -- sparking questions about the company's future.
Under the deal, Nissan will become the struggling firm's top shareholder, vaulting past Mitsubishi Heavy Industries, which owns about 20 per cent of the Outlander sport utility vehicle maker.
Nissan and French automaker Renault own share stakes in each other and their sales lumped together with those of the smaller Mitsubishi would top 9.5 million units annually -- although they will operate as independent firms.
That is not far behind the 10.15 million sold last year by Toyota, the world's top automaker, and 9.9 million shifted by German giant Volkswagen.
Chevrolet and Cadillac maker General Motors moved 9.8 million vehicles globally in 2015.
"This transaction represents a potential win-win for both of our companies and promises growth opportunities," Nissan CEO Carlos Ghosn told reporters.
"We are determined to preserve and nurture the (Mitsubishi) brand. We will help this company to address the challenges it faces, particularly in restoring consumer trust."
- AFP