Grey matter refers to unmyelinated neurons and other cells of the central nervous system. It is present in the brain, brainstem and cerebellum, and present throughout the spinal cord.rey matter refers to unmyelinated neurons and other cells of the central nervous system. It is present in the brain, brainstem and cerebellum, and present throughout the spinal cord.
Kaz Tada (left) was one of those rounded up. Kaz was a Nisei  a person born in America of parents who immigrated from Japan. Nisei is a Japanese word meaning second generation. Isei refers to first generation immigrants, those who came the U.S. from Japan. And Sensei refers to third generation Japanese Americans.
Since the end of World War II, there has been debate over the terminology used to refer to camps in which Americans of Japanese ancestry and their immigrant parents, were incarcerated by the United States Government during the war.f 127,000 Japanese Americans living in the continental United States at the time of the Pearl Harbor attack, 112,000 resided on the West Coast. About 80,000 were nisei (literal translation: second generation; American-born Japanese with U.S. citizenship) and sansei (third generation; the children of Nisei).