Country/territory: Japan

IBA Criteria met: A4i (2004)
For more information about IBA criteria please click here

Area: 331 ha

Wild Bird Society of Japan
Most recent IBA monitoring assessment
Year of assessment Threat score (pressure) Condition score (state) Action score (response)
2015 low near favourable medium
For more information about IBA monitoring please click here

Site description
It is one of the largest breeding sites of Great Cormorant in Japan. Great Cormorants have occurred in this site since around 1829 and they were historically well protected because their droppings could be utilized as fertilizer. Around 12.17 ha of the area surrounding Unoyama has been designated as a National Natural Monument for the breeding colony of Great Cormorant.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Unoyama. Downloaded from on 27/03/2023.