Everyone knows a woman’s hand temperature is not suitable to be a top sushi chef
https://torontolife.com/food/why-are-there-no-female-sushi-chefs-blame-warm-hands-and-menstruation/
According to the Star, there are only three female sushi chefs in Toronto because of a series of age-old beliefs about how the Japanese culinary art must be executed:
Women’s hands are too warm to handle raw fish or sushi rice. Their perfume, makeup and lotions interfere with the food. Hormonal fluctuations wreak havoc on delicate Japanese food.