 Okimoto initially finished fourth at the 10 km race at the 2016 Olympics hosted by Brazil.A disqualification of second placed Aurélie Muller upgraded her to the bronze, making Okimoto the first Brazilian woman to win a swimming Olympic medal.The following year, Okimoto wound up absent of the 2017 World Championships, finishing third in the national 10 km qualifiers and skipping the 5 km ones.