 In 2008, Matsumoto was nominated to the U.S. District Court for the Eastern District of New York by President George W. Bush on March 11, 2008, to a seat vacated by Edward R. Korman.Matsumoto was confirmed by the Senate on July 17, 2008, on a majority vote and received commission on July 22, 2008.Born to second-generation Japanese American parents, Matsumoto became the second Asian Pacific American woman to serve as a federal district court judge.