Ena is also a treasure trove of historical sites including Oi-juku, one of the 67 post towns on the Nakasendo; the ruins of Iwamura Castle, one of three Japan’s greatest mountain castles; and the Japan Taisho Village, which preserves the atmosphere of the Taisho period (1912-1926).
The city was originally founded on April 1, 1954, but it merged with four towns and a village from the former Ena District to form the new city of Ena on October 25, 2004. The other municipalities participating in this merger were: Akechi, Iwamura, Kamiyahagi, Kushihara, and Yamaoka.
The fact of Ena (as of February 2014):
Prefecture: Gifu Prefecture
Population: 52,606 (19,496 family units)
Area: 504.19 km²
Flower of the City: Bamboo lily
Tree of the City: Acer pycnanthum (similar to red maple)