April 1971	Graduate School of Law(Master’s Level) established
April 1972	Graduate School of Letters(Master’s Level) established
April 1984	Graduate School of Economics (Master’s Level) established
April 1993	Graduate School of Socio-Environmental Studies(Doctoral Level) established
April 1993	Division of Regional Socio-Environmental Studies and International Socio-Environmental Studies established
April 2006	Reorganize Graduate School of Law, Letters, Economics and Socio-Environmental Studies into Graduate School of Human Socio-Environmental Studies(Master’s / Doctoral Course)
April 2012	Reorganization of the Graduate School of Human and Socio-Environmental Studies(Master’s Course)
April 2014	Course Reorganization of the Graduate School of Human and Socio-Environmental Studies(Doctoral Course)
April 2018	A new Course of the Graduate School of Human and Socio-Environmental Studies(Master’s Course) established