Sada was 19 years old at the time of evacuation. At that time, he had three brothers: Setsuo (27), Masakatsu (21), Taketo (24). When the US entered the war, Sada was a student at the University of Washington. He evacuated with his mother and brother Taketo. Sets and Mas, or “Bear,” were serving in the military. Daikichi Omoto, Sada's father, passed away in 1931. Sada also had a sister, Kanee, who passed away in 1932. All four of the Omoto boys served in the army during WWII. Sada is a retired professor of Art History from the Michigan State University.