| April 1987 | Formation of a Preparatory Committee for Establishment of the United Graduate School of Agricultural Sciences, Kagoshima University. |
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| April 1988 | Establishment of the United Graduate School of Agricultural Sciences (3-year Doctoral Program) consisting of three universities, Kagoshima University, University of Miyazaki, and Saga University. |
| April 1992 | Participation of University of the Ryukyus in the United Graduate School. |
| April 2004 | Four Universities were reconfirmed their participation in the United Graduate School of Agricultural Sciences based at Kagoshima University under new treaties that turned national universities into independent administrative entities. |
| April 2005 | A cooperative postgraduate program was established based on a collaborative agreement for research and education with Takara Bio Inc (through March 2025). |
| April 2007 | Reestablishment of the United Graduate School of Agricultural Sciences consisting of three universities, Kagoshima University, Saga University, and University of the Ryukyus. |
| April 2009 | Reorganized from 4 Courses 11 Major Chairs to 3 Courses 9 Major Chairs (Rengo-Koza). |
| April 2025 | Reorganized from 3 Courses 9 Major Chairs to 1 Course 3 Divisions. |
