Japan's Mitsubishi Motors 7211.T is set to join an alliance between Honda Motor 7267.T and Nissan Motor 7201.T, creating an auto group with combined sales of more than 8 million vehicles, the Nikkei business daily said on Sunday. Nissan and Honda said in March they were considering a strategic partnership to collaborate on producing key components for electric vehicles and artificial intelligence in automotive software platforms. (Reporting by Kiyoshi Takenaka; Editing by Sonali Paul)