Nissan Motor Co. and mobile game-maker DeNA Co. said Friday that they will launch an autonomous-driving taxi service for a two-week experiment in Yokohama next month, with the participation of 300 groups of people who will be asked to give feedback after using the ride-hailing app.

The companies aim to officially launch a full service in the early 2020s.

The world has yet to see a hailing service for a self-driving taxi, so "we are going to learn about some of the things that maybe we can't foresee without actual testing," said Ogi Redzic, senior vice president of the existing alliance among Nissan, Renault SA of France and Mitsubishi Motors Corp., during a news conference in Yokohama.