 Hosokawa's later writings and news reports were influenced by his time spent interned with fellow second-generation Japanese Americans, who were known as "Nisei", and their children, such as his son, who were known as "Sansei".Since Hosokawa had journalism and writing experience, he was appointed the editor of the Heart Mountain Relocation Camp newspaper, "The Heart Mountain Sentinel".Hosokawa and his family were released from the internment camp in 1943, so he could work as a copy editor at "The Des Moines Register".