Education Ishii received her bachelor's degree from Tokyo Women's Christian University in 1973 and her master's degree from Waseda University in 1975. She earned her PhD from Tokyo Metropolitan University in 1983 Awards and honours Ishii received the Saruhashi Prize for accomplishments by a Japanese woman researcher in the natural sciences in 1995. As a postdoc, Ishii was inspired by reading a profile of Fumiko Yonezawa, a physicist and former winner of the Saruhashi prize Ishii received the Algebra Prize from the Mathematical Society of Japan in 2011 References Birth year from ISNI authority control file, retrieved 2018-11-28 "Ishii, Shihoko". Mathematical Reviews. Retrieved 8 April 2017 "Shihoko Ishii". Retrieved 8 April 2017 Sumiko Otsubo (2008). "Women Scientists and Gender Ideology". in Robertson, Jennifer. A Companion to the Anthropology of Japan. p. 474 "Prizes by Research Sections". Retrieved 8 April 2017

Ishii's research focuses on singularity theory. She studies arc spaces, a mathematical concept related to jets: arc spaces are varieties encapsulating information about curves on another variety