- 2022 - 2026 Synthetic humanities onviews of the races and world depicted by "Bankoku jinbutsu zu" (varied people's figures over the world) made in pre-modern Japan
- 2016 - 2019 A RE-EXAMINATION OF RECOGNITION OF HISTORY OF THE SPRING AND AUTUMN PERIOD BASED ON EXCAVATED TEXTS
- 2013 - 2016 A RECONSTRUCTION OF ZUOZHUAN STUDY BASED ON EXCAVATED TEXTS
- 2010 - 2012 A STUDY OF HISTORY OF XIANBEI AND KHITAI BASED ONINVESTIGATIONS OF EXCAVATED SOURCES IN EASTERN INNER MONGOLIA ANDWESTERN LIAONING
- 2006 - 2008 A STUDY OF ETHNIC GROUPS IN THE NORTHERN FRONTIER OF CHINA BEFORE THE 3RD CENTURY B.C. BASED ON INVESTIGATIONS OF SOURCES CONCERNING BRONZE CULTURES IN THE EASTERN INNER MONGOLIA
- 1995 - 1997 A Study of the Political-Social History of the Interim between Spring and Autumn and Warring States Periods
- 1991 - 1992 A diplomatic study of the Chinese excavated written materials
- 1988 - 1990 The Racial Problem and the International Relationships under the Reign of Ch'ing.
- 1989 - 1989 中国古代史料の文献学的研究-『国語』・『戦国策』を中心に-
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