After working as a TV Asahi announcer and reporter, Nemoto joined UNHCR (United Nations High Commissioner for Refugees) in 1996. In her career at UNHCR till end 2011, she was active in the field to assist and protect refugees as well as in developing policies and managing fund-raising from the private sector at the Geneva headquarters. Nemoto also worked as spokeswoman for WFP (World Food Program) and Executive Director at Japan Association for UNHCR. She assumed her current position in August 2013. From September 2016 through June 2024, she was a member of the Sustainable Development Goals (SDGs) Promotion Roundtable, established by the Japanese Government. She received the “Person of the Year Award” of the Public Relations Society of Japan for the year 2021, praised for her work on promoting UN activities and the importance of SDGs. She earned Law degree from University of Tokyo and Master’s degree in International Relations from Columbia University.