Tsukasa Iga is a designated associate professor at the Asian Satellite Campus Institute, Nagoya University, specializing in political science and area studies. Keiko Tsuji Tamura is professor emerita and research fellow at The University of Kitakyushu, specializing in international relations theory and Southeast Asian area studies, especially politics, society and gender in Singapore. Wataru Kusaka is professor at the Graduate School of Global Studies, Tokyo University of Foreign Studies, specializing in political science and Philippine studies. Kaoru Aoyama is a professor at the Graduate School of Intercultural Studies, Kobe University.