At the 2005 Census the district was estimated to have a population of 14,509. The total area was 38.53 km2.
Timeline
April 1, 1971 - The village of Biwa gained town status.
February 13, 2006 - The towns of Azai and Biwa were merged into the expanded city of Nagahama.
January 1, 2010 - The towns of Kohoku and Torahime were merged with the expanded city of Nagahama. Higashiazai District was dissolved as a result of this merger.
Mergers
On February 13, 2006, the towns of Azai and Biwa were merged into the expanded city of Nagahama.[1]