Kono Yasui (?? ??, Yasui Kono, 16 February 1880 – 24 March 1971) was a Japanese biologist and cytologist.
In 1927, she became the first Japanese woman to receive a doctoral degree in science.
She received a Medal of Honor with Purple Ribbon and was awarded as an Order of the Precious Crown Third Class for her academic accomplishments and leadership in women’s education in Japan.