On October 25, 2004, Iwamura, along with the towns of Akechi, Kamiyahagi and Yamaoka, and the village of Kushihara (all from Ena District), was merged into the expanded city of Ena, and no longer exists as an independent municipality.
Iwamura Castle is located in Iwamura.
- 合併までの経緯. Ena official website (in Japanese). Retrieved August 15, 2011.
- Official website of Ena (Japanese)
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