Hyoko Lake was originally constructed in the 17th century as an agricultural irrigation reservoir.
The park was the site of the first successful artificial feeding of wild swans in Japan, initiated in 1954.
It is designated as a Wildlife Protection Area under Japanese law due to its importance for migratory waterfowl.
The park is officially registered as a Ramsar wetland site, highlighting its international ecological significance.
Local conservation groups organize daily feeding sessions during the peak winter migration season.
The lake surface is known for its reflective qualities, often utilized for photography during calm weather conditions.
Hyokosuikin Park is a public recreational space centered around Hyoko Lake, a location internationally recognized as a Ramsar Convention site. The park serves as one of Japan's primary wintering grounds for thousands of migratory swans, particularly tundra swans and whooper swans. It features an extensive walking trail system that encircles the water, providing direct access to bird-watching observation points. Visitors can observe local wildlife, including various species of ducks and geese that coexist with the migratory swan populations. The park is integrated into the Suibara district landscape, bordered by residential and agricultural land in Agano city. It functions as a managed environmental sanctuary with specific regulations regarding bird interaction and feeding.
The wooden pedestrian bridge or the designated observation platforms along the northern shore for expansive views of the swan flocks.
Bring high-quality binoculars to observe waterfowl behaviors without disturbing them.
Wear layered clothing, as the open lake area is significantly windier and colder than the surrounding town.
Check local conservation updates before arrival to confirm if bird flu precautions currently restrict access to certain lake-side paths.
Attempting to touch or chase the swans, which causes them significant stress and is discouraged by local wildlife authorities.
Bird activity is strictly seasonal; swans are present from late autumn through early spring and depart for Siberia by mid-spring.
Do not feed the swans human food or bread; only use authorized feed provided by on-site conservationists. Maintain a quiet distance from the water's edge to prevent scaring the birds.
