On March 22, 2005 – The towns of Miyanojō and Tsuruda (both from Satsuma District) were merged into the expanded town of Satsuma (former name: 薩摩町; current name: さつま町). (Merger Information Page)
On March 13, 2006 – The old city of Izumi absorbed the towns of Noda and Takaono (both from Izumi District) to create the new and expanded city of Izumi.
On March 20, 2006 – The city of Naze was merged with the town of Kasari, and the village of Sumiyo (both from Ōshima District) to create the city of Amami.
On November 1, 2008 – The city of Ōkuchi was merged with the town of Hishikari (from Isa District) to create the city of Isa. Isa District was dissolved as a result of this merger.
On March 23, 2010 – The former town of Aira absorbed the towns of Kajiki and Kamō (all from Aira District) to create the city of Aira. Aira District was left with one municipality.