Masaaki Yuasa and his Science SARU studio teased their new film during a masterclass panel at the 2018 Annecy International Animated Film Festival on Thursday.
The film also won the Silver Prize for the “Best Animated Feature Film” audience award at Montreal’s Fantasia International Film Festival in August.
Yuasa’s Lu over the wall film won the top “Cristal for a Feature Film” award at the Annecy International Animated Film Festival last year, the first Japanese film to do so in 22 years.
Yuasa added that he will formally announce the film in Japan a little later, and asked fans to look forward to the announcement.