Hokkaido Lakes Catalog

OkhotskLagoon-origin lake

Lake Tofutsu

Abashiri City / Koshimizu Town ・ 濤沸湖

NowLake Tofutsu today3D view built from GSI elevation data and recent aerial imagery. Use the buttons at top left to view from the north, east, south or west, or drag to rotate. On phones, move two fingers up or down to tilt, and pinch to zoom.

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GSI Tiles (elevation tiles, seamless aerial photos), processed by this site.

1977Lake Tofutsu in 1977Aerial photo taken by the Geospatial Information Authority of Japan, shown with the film edge and instruments intact.

Aerial photo of Lake Tofutsu (Abashiri City / Koshimizu Town, Hokkaido) taken in 1977
Taken October 23, 1977. Source: aerial photo by the Geospatial Information Authority of Japan (1977), resized.GSI Maps and Aerial Photo Service

About Lake Tofutsu

A brackish lake spanning Abashiri City and Koshimizu Town, called Topu (the lake's mouth) in the Ainu language. A long dune built by a sandspit separates it from the sea, with a narrow connection at its northwestern end. It is no more than 2.5 m deep, and more than 60,000 geese and ducks arrive every year. Koshimizu Natural Flower Garden lies on its north side. It was designated a Ramsar Site in 2005.

Sources: Ministry of the Environment, Ramsar Site leaflet: Tofutsu-ko, Environment Agency of Japan, Lake Survey Report (1993) (sources in Japanese)

Lake data

Surface elevation
0.55 m
Transparency
0.8 m#52 in Hokkaidoas of the 1991 survey
Origin
Lagoon-origin lake
Lake type
Eutrophic
Freezing
Freezes in winter
Natural park
Abashiri Quasi-National Park
Ramsar Convention
Ramsar Site
Lake number
0260number 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 1991), 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 Lake Tofutsu

Nearby lakes

Nearby roadside stations

Straight-line distances.