Hanako Koyama. Detached to Act: An Interpretation of the Arendtian Spectator. International Relations and Diplomacy. 2014. 2. 6. 389-400
Hanako Koyama. Freedom and Power in the Thought of Hannah Arendt: Civil Disobedience and the Politics of Theatre. Theoria: A Journal of Social and Political Theory. 2012. 59. 133. 70-80