[3] Yamamoto Senji, a colleague of Oyama, was assassinated on the same day as he had presented testimony in the Japanese Diet regarding torture of prisoners.

[3] Ikuo Oyama would serve as Colegrove's assistant for research of Japanese Political Science in Northwestern University.

[4] In 1945 John K. Emmerson approached Oyama to discuss the former Labor Farmer Party politician's role in postwar Japan.

[3] According to Emmerson, Oyama was against the removal of the Emperor by the Allied powers but was confident that the Japanese themselves would reform the imperial institution.

In addition, Oyama hoped that the Japanese constitution would be revised to establish a genuine party government and guarantee the freedom of speech and press.

Oyama happily shook hands with Zhou Enlai, even though Japan and the People's Republic of China did not have diplomatic relations during his lifetime.