Sega is developing four games, including Tokyo 2020 Olympics: The Official Game, in connection with the 2020 Olympic Games.
Nishimura founded Studio Ponoc in 2015, and the studio also employs other former Studio Ghibli animators.
The short will debut in the lead-up to the 2020 Summer Olympics, which will be held in Tokyo from July 24 to August 9.
The International Olympic Committee (IOC) announced on Monday that it has commissioned Studio Ponoc to produce an anime short inspired by the Olympic values.