Biography
Mitsuru Koshiyama was a Japanese American participant in the Heart Mountain draft-resistance movement. After being confined at Heart Mountain during World War II, he was prosecuted for refusing military conscription and imprisoned at McNeil Island in Washington. He later recalled that he did not attend Fair Play Committee meetings.
1942 forced-removal chronology
The Heart Mountain institutional biography records arrival at Santa Anita Assembly Center on May 28, 1942, followed by Heart Mountain on September 14, 1942. These are dated confinement milestones, not a complete continuous-custody span or a revision of the later draft-resistance case. Heart Mountain institutional biography.
The Heart Mountain institutional biography records that Koshiyama was held first in jail in Casper and then in Cheyenne before his June 1944 draft-resistance trial. He recalled worse conditions in the Cheyenne jail. These are pretrial custody locations, without verified transfer days or an additional sentence-service total.
The Heart Mountain institutional biography records that Mitsuru Koshiyama was pardoned by President Harry Truman on December 24, 1947. This pardon is distinct from the earlier physical release from prison. Heart Mountain institutional biography.
