Photocopy of a declassified file on Keizaburo Koyama by the Federal Bureau of Investigation. This page goes into greater detail the reasoning for interning Koyama. The FBI has labeled the Fatherland Society as "one of the most aggressive and active of the Japanese nationalist organizations...It's members are selected by reason of their intense loyalty and belief …

Photocopy of a declassified report detailing the reasoning behind the recommendation that Dr. Keizaburo Koyama be interned as an alien enemy. This page continues with the assessment of the Japanese Chamber of Commerce. The Chamber felt it was under FBI investigation in 1940 and someone there suggested they conduct their meetings in secret. The report states …