Sasaki, who was the chief creative director for the opening and closing ceremonies at this year’s Games, said he told a planning group through a group discussion that Naomi Watanabe could play a role as ‘Olympiad’.
“There was a very inappropriate expression in my ideas and comments,” Sasaki said in a statement issued by Games organizers in the early hours of Thursday morning. “I sincerely apologize to her and people who feel uncomfortable with such content.”
Organizers say Tokyo 2020 CEO Hashimoto and Toshiro Muto will attend a news conference on Thursday.
Sasaki’s resignation came quickly after the weekly Shukan Bunshun reported his comments on Wednesday.
Mori, 83, a former prime minister, has been replaced by Hashimoto, the athlete politician, who has vowed to make gender equality a top priority at the Games.
The Olympic Games are scheduled for July 23 to August 8 and the Paralympic Games from August 24 to September 5.