The alliance between Renault SA and Nissan Motor Co. needs to come up with a sustainable plan for a future when Carlos Ghosn is no longer around as chairman to guide the partnership, the top executive said.

The main concern is how to assure all stakeholders that "we will continue to go well in the long term," Ghosn said in an interview with Bloomberg Television's Stephen Engle in Hong Kong on Friday. "We have to solve something, which supposedly may happen after my term is finished. We are on the right track."

Ghosn, 64, has said the alliance is considering many options to help deepen the tie-up between the Japanese and French automakers into something "irreversible." Bloomberg News reported last month that the two are in talks to merge under a single stock, a move that could help them pool resources better in the new age of electrified vehicles and autonomous driving.