Michiko Yoshida is a midwife and has about twenty years of professional experiences in clinical nursing and university teaching. She received a master’s degree in the work about taste of milk from inflamed breasts (Breastfeed Med. 2014 9(2):92-7) and obtained a doctorate in this study (Early Hum Dev. 2015 91(9):519-26) from a postdoctoral course of Akita Graduate School of Medicine under the guidance of professor Kodama. Then she promoted assistant professor of the Japanese Red Cross Akita College of Nursing in 2017. Her special interest about research has included a circadian rhyme of early infants.