Final answer:
Most Japanese Americans who were American citizens became citizens of the United States because they were born on U.S. soil.
Step-by-step explanation:
Most of the Japanese Americans who were sent to internment camps and were American citizens became citizens of the United States because they were born in the United States. The Fourteenth Amendment of the U.S. Constitution grants citizenship to anyone born on U.S. soil, regardless of the citizenship status of their parents. Therefore, these individuals were automatically considered American citizens by birth.
Learn more about Citizenship of Japanese Americans in internment camps during World War II