Julie Otsuka (born May 15, 1962) is a Japanese painter and writer. She is known for drawing from her personal life to write autoethnographical historical novels about the life of Japanese Americans. In 2002 she published her first novel, When the Emperor was Divine, which is about the Japanese-American internment camps that took place in 1942-45 during World War II. The story begins in California, where she was born and raised, and it is based on Otsuka's grandfather who was arrested as a suspected spy for Japan the day after Pearl Harbor.
https://en.wikipedia.org/wiki/Julie_Otsuka