Honda Motor Co. and Nissan Motor Co. called into question an agreement reached less than two months ago to consider combining, casting doubt on their efforts to form one one of the world’s largest automakers.

Two of Japan’s largest automakers have been in talks to combine their operations to form one of the world’s biggest car groups.

There's strife of the horizon as Nissan vehemently opposes Honda's suggestion of making the struggling carmaker its subsidiary.