All the flying car concepts, which are like drones big enough to hold humans, promise to be better than helicopters, which are expensive to maintain, noisy to fly and require trained pilots, Ebihara and other proponents say.

“You may think of ‘Back to the Future,’ ‘Gundam,’ or ‘Doraemon,’” Ebihara said, referring to vehicles of flight in a Hollywood film and in Japanese cartoons featuring robots. “Up to now, it was just a dream, but with innovations in motors and batteries, it’s time for it to become real.”

Google, drone company Ehang and car manufacturer Geely in China, and Volkswagen AG of Germany have invested in flying car technology.