Final answer:
The Port Jefferson Mill records from 1907 do not specify how Japanese workers were referred to; however, the context implies significant changes in Japanese economic activities and discrimination against Japanese immigrants in the United States during that period.
Step-by-step explanation:
The Port Jefferson Mill records from 1907 do not have a direct reference in the provided materials, which discuss broader aspects of Japanese history and the experiences of Japanese Americans, particularly with respect to immigration, labor, and the internment during World War II.
However, what can be inferred about the period and context might suggest that Japanese workers, along with other aspects of Japanese society, went through significant changes reconceptualizing their economic activities, as Historian Amino Yoshihiko noted for the premodern Japanese economy. By the early 20th century, Japan had industrialized and was participating actively in global commerce.
In the United States, Japanese immigrants worked in various sectors, including mills, taking on roles that were vital to the industry yet likely faced discrimination due to the anti-Japanese sentiment of that era.