Lake Hyoko

Country/territory: Japan

IBA Criteria met: A4i, A4iii (2004)
For more information about IBA criteria please click here

Area: 310 ha

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

Site description
Lake Hyoko in Niigata Prefecture was meant to be a farm pond. As the numbers of the wintering swans are increasing, it has been enlarged. It is Hyoko Suikin Koen (Hyoko Waterbirds Park) now and has an area of 30 ha. There are paddy fields around Hyoko where ducks and swans forage. The Aganogawa river flows at the southwestern direction of Hyoko, and Tundra Swans roost on a sandbar along the river. Nelumbo nucifera and Euryale ferox grow in the lake, and Phragmites australis extend at northeastern side of the lake. Prunus x yedoensis was planted around the lake, and hydrophites grow in Ayameike pond.

Recommended citation
BirdLife International (2023) Important Bird Areas factsheet: Lake Hyoko. Downloaded from on 30/01/2023.