Kōka District, Shiga
# Kōka District, Shiga

Kōka (甲賀郡, Kōka-gun) was a district located in Shiga Prefecture, Japan.

As of 2003, the district had an estimated population of 147,928 and a density of 267.90 persons per $km^2.$ The total area was 552.18 $km^2.$

From circa 1460 until 1574, during the Sengoku period, the district was effectively independent of centralized state control and operated as the Kōka-gun Chūsō, a military confederacy of jizamurai and other warrior families that became known as ninja. During this period it formed an alliance with its southern neighbor, the Iga Sokoku Ikki, a similar independent confederacy of ninja families. Both alliance and the ikki ended when Oda Nobunaga defeated Kōka and compelled it to be a vassal.

## Towns and villages

Before the dissolution in 2004, the district had seven towns as listed below. Each municipality is now a part of the city noted in the parentheses.

* Ishibe (Konan)
* Kōsei (Konan)
* Kōka (Kōka)
* Kōnan (Kōka)
* Minakuchi (Kōka)
* Shigaraki (Kōka)
* Tsuchiyama (Kōka)

## Mergers

* On October 1, 2004:
   * the towns of Kōsei and Ishibe were merged to create the city of Konan.
   * the former town of Kōka absorbed the towns of Kōnan, Minakuchi, Shigaraki and Tsuchiyama to create the city of Kōka. Kōka District was dissolved as a result of this merger.
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