Tomoyasu Iiyama is a Professor in the Faculty of Letters, Arts, and Sciences at Waseda University. Before teaching at Waseda, he held a number of visiting scholarships at Chinese Academy of Social Sciences, Harvard-Yenching Institute, and the Council on East Asian Studies at Yale University. His research interests cover the acculturation, social transition, and the emergence of new ancestry in historical China. He has published several monographs concerning these topics, including Civil Service Examinations in North China under the Jin and Yuan Dynasties: Another Trajectory of the Evolution of Literati Community in Chinese History (Kin gen jidai no Kahoku shakai to Kakyo seido: Mou hitotsu no shijin sō) (Tokyo: Waseda daigaku shuppanbu, 2011 (in Japanese)); Another Literati Society: Civil Service Examinations in North China under the Jin and Yuan Dynasties (Translated by Zou Di. Hangzhou: Zhejiang daxue chubanshe, 2021 (in Chinese)); and Genealogy and Status: Hereditary Office-Holding and Kinship in North China under Mongol Rule (Harvard University Asia Center, 2023).