Ochanomizu University
Throughout the 1930s and 1940s, Kuroda's research examined the pigments of the Asiatic dayflower, eggplant skin, black soybeans, red shiso leaves and sea urchin spines, as well as derivatives of naphthoquinone. She was awarded the Majima Prize by the Chemical Society of Japan in 1936. She was appointed professor at Ochanomizu University in 1949, and at the same time began researching the pigmentation of onion skin. Her extraction of quercetin crystals from onion skin led to the creation of Kerutin C, an antihypertensive drug. She retired in 1952, but continued to lecture at Ochanomizu University as a professor emeritus. She was awarded a Medal with Purple Ribbon in 1959 and was conferred the Order of the Precious Crown of the Third Class in 1965. She developed heart disease in 1967 and died on 8 November 1968 in Fukuoka, aged 84.