ITO Masatoshi (Ph.D. in International Relations) was born in Chiba Prefecture in 1983. ITO is Assistant Professor at the College of International Relations, Nihon University. He specializes in Area Studies (South East Asia). His research interests include the ethnicity of Japanese Indonesians, and the life world and cross-cultural adaptation of Muslim Indonesians living in Japan. ITO’s major publications include “An Ethnography of the Japanese Indonesians―Weaved Japanese Consciousness―(Shumpusya,2022), and “Japanese Diasporas: Unsung Pasts, Conflicting Presents, and Uncertain Futures” (2008), co-translated by Shinsensha. His articles include “First Generation Japanese Indonesians Who Became an Orang Jepang―A Case Study of North Sumatra, Sumatra Island―” (International Cultural Expression Studies, No,17, 2021) and “The Practices of Indonesian Muslims in Japan―We Only Eat the Food Which We Can Eat―” (Journal of Popular Culture Association of Japan, No.27, 2020).