[3] From 1949 until 1957, she and her husband Kimishige Ishizaka worked at Keizo Nakamura's laboratory where she studied the mechanisms of anaphylaxis.
[3] By 1962, the Ishizakas were recruited to the Children's Asthma Research Institute and Hospital (CARIH, later National Jewish Health) in Denver.
[5] By 1970, rumors of a merger with the National Jewish Hospital made the couple move to the Allergy and Immunology Center at Johns Hopkins University in Baltimore .
[1] The same year, her husband became the first Scientific Director of the La Jolla Institute for Immunology, so she moved to California, and retired in 1993.
[4] On June 4, 2019, Ishizaka died with symptoms of Parkinson's disease in Yamagata, Japan, at the age of 92 years.