It was originally created in 1839 by the merger of the towns of Trèves and Cunault.

It was formed on March 31, 2005 from the merger of the towns of Nita and Yokota.

Minamiechizen, formed on January 1, 2005 by the merger of the two former towns and one former village in the district:

The city was formed on November 1, 1936 by a merger of the towns of Takayama and Onada.

It was created by the merger of the towns of Amarume and Tachikawa in 2005.

The plan for the merger of the three towns was defeated twice.

The town was formed on January 1, 2006 by the merger of the towns of Kogota and Nangō.

The town was formed on October 1, 2005 from the merger of the towns of Miyahara and Ryūhoku.

It was formed on 1 January 2013 by the merger of the former towns Belgern and Schildau.

Voting a second time for a final merger of the four towns into a single city, the resolution passed by 2163 votes "for" and 596 "against".