Doesn't change the FACT Renault and Nissan are separate companies even if they have cross holding shares and share the same Chairman of the Board.
Nissan owns a controlling(according to Japanese law) 34% stake in Mitsubishi Motors. So that is good enough to consider them one company.
Nissan owns a veto interest 34% stake in Mitsubishi Motors, by Japanese law they can veto any decisions, but reciprocity is permitted.
Renault owns a 42% stake in Nissan, by French anti-cross holding laws, this dissallows Nissan from increasing its stake in Renault, effectively under french law Nissan is a partially owned subsidiary of Renault. the bond between Renault and Nissan is a master and servant bond. Its just that the servant is far stronger and richer than the master.
So Renault Nissan are legally much more unified than Nissan Mitsubishi.
but Renault stays true to European industrial base vs Nissan being Japanese industrial base, In some aspects there is alot more cohesion between Nissan and Mitsubishi (kei cars, transmissions), but other components also.
the issue of Renault's lordship over Nissan is the core outstanding issue of the alliance, Ghosn has made it work, but that is not natural, he is special in that regard. this also becomes personal issue, Macron and Ghosn have clashed before. de facto french state control of Nissan is a curious attribute.
Renault-Nissan cross-shareholding ratio will remain the same, Nissan says
its complex, the alliance is subject to laws of both France and Japan, neither of which are British or American in nature