Japan's Mitsubishi Motors is set to join an alliance between Honda and Nissan, creating a tie-up between the automakers with combined sales of more than 8 million vehicles, the Nikkei business daily said on Sunday.

Mitsubishi Motors, which is 34% owned by Nissan, will work with Honda and Nissan to finalize the details of their strategic partnership, Nikkei said, adding that the three firms intend to standardize in-vehicle software that controls cars.

Mitsubishi Motors declined to comment on the report, while a Nissan spokesperson would only say that the report was not based on something either of the companies had announced.