Onneto Pond

About Onneto Pond

A brackish, lagoon-origin lake in Nemuro City, connected to Nemuro Bay. In the 1991 survey it ranked 3rd in Japan among unmodified lakes with a shoreline of 5 km or more (13.9 km). Eelgrass grows here, with Manila clams and corbicula clams, fish such as surf smelt, chum salmon, flounder and saffron cod, and whooper swans and red-crowned cranes in winter.

Sources: Environment Agency of Japan, Lake Survey Report (1993), Environment Agency of Japan, Lake Survey Report: Data Appendix (1993) (sources in Japanese)

Lake data

Area

6.44 km²#13 in Hokkaido

Maximum depth

7.3 m#28 in Hokkaido

Average depth

1.2 m

Surface elevation

0 m

Transparency

1.7 m#28 in Hokkaidoas of the 1991 survey

Origin

Lagoon-origin lake

Lake type

Oligotrophic

Fresh or brackish

Brackish

Freezing

Freezes in winter

Unmodified lake

Yes (shore entirely natural)

Natural park

Notsuke-Furen Prefectural Natural Park

Lake number

0430number in the national lake survey

Sources: Geospatial Information Authority of Japan, Area Statistics of Prefectures and Municipalities 2026 (as of July 1), Geospatial Information Authority of Japan, Lake Survey (surveyed 2009), Environment Agency of Japan, 4th National Survey on the Natural Environment: Lake Survey Report (1993). Area and depth use newer figures from the Geospatial Information Authority of Japan where available. Origin, lake type, transparency, freezing and unmodified status are as of the 1991 survey.

Themes that include Onneto Pond

• Lagoon-origin lakes
• Oligotrophic lakes
• Brackish lakes
• Unmodified lakes