He also collaborated with director Mamoru Hosoda to provide character designs for the films The Girl Who Leapt Through Time, Summer Wars, and Wolf Children.

[citation needed] In a 2013 interview with Japanese Entertainment website Nihongogo, it was revealed that Sadamoto is a stickler for details and wouldn't feel comfortable illustrating anything too unfamiliar to him.

When asked about dream collaborations he revealed an interest in working with Robert Westall and Philip K. Dick but apologized "These are all deceased people, sorry.

"[1] On August 9, 2019, Sadamoto criticized on Twitter a statue featured in the “After ‘Freedom of Expression’?” historical art exhibition at the Aichi Prefecture Museum of Art, Statue of Peace (2011), by Kim Seo-kyung and Kim Eun-sang memorializing comfort women, girls who worked in wartime brothels in World War II for the Japanese military.

He also criticized a movie in the exhibition that showed a picture of the Emperor of Japan being burned and then stomped underfoot, he referred to it as "indistinguishable from a certain country's style of propaganda".

), was instead handed to Hidenori Matsubara for most of the Rebuilds, with Sadamoto being credited instead as "original character design" in 2.0, 3.0 and 3.0+1.0, with diminishing involvement in a supervisory role for 2.0 and 3.0.