was a district located in Shiga Prefecture. The district is equivalent to the town of Nishiazai in Ika District.
Timeline 1878 – Azai District splits into Nishiazai and Higashiazai Districts. April 1, 1889 – Municipal status is enforced. The villages of Shiotsu and Nagahara are formed. April 1, 1897 – Nishiazai District merges into Ika District.
See also List of dissolved districts of Japan