Considered a "dangerous enemy alien," Matahichi Iseri was separated from his family and sent to the Department of Justice internment camp at Fort Missoula, Montana. In June 1942, he received a Change of Residence Notice certificate, which indicated that his request to join his family at the Pinedale Assembly Center in California had been approved.

This letter discusses Matsuye Koike's repatriation date and his preparations to leave the U.S. The letter was "detained alien enemy mail examined."