Why are Japanese pearl divers only women?

Japanese pearl divers, known as "ama," have traditionally been women due to cultural and historical reasons. The practice, which dates back over a thousand years, was often seen as suitable for women because of their supposed ability to hold their breath longer and their smaller physical size, which allowed them to dive deeper and more efficiently. Additionally, societal roles and gender norms played a significant part, as men were often engaged in other occupations while women took on the responsibility of pearl diving. Today, while men can and do dive, the ama tradition remains predominantly female.