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 volunteer project in Ena is organized by NPO Eureka International.
The mission of NPO Eureka International is to provide opportunities for people to promote a change in perception and to discover their own unique talents through the experience of cultural exchange. We are contributing to the development of a community with positive energy by cultivating people who have an open mind and enjoy being creative and innovative.