Lake Kuttara

{{Short description|Caldera lake on the island of Hokkaido, Japan}}

{{Infobox body of water

| name = Lake Kuttara

| native_name ={{native name|ja|倶多楽湖}}

| image = 131102 Lake Kuttara Shiraoi Hokkaido Japan01s3.jpg

| caption = View from the crater rim (November 2013)

| image_bathymetry =

| caption_bathymetry =

| location =

|pushpin_map=Japan Hokkaido

| coords = {{coord|42|30|N|141|10|E|region:JP_type:waterbody|display=inline,title}}

| type = oligotrophic crater lake

| inflow = none

| outflow = evaporation

| catchment =

| basin_countries = Japan

| length =

| width =

| area = {{convert|4.68|km2|mi2|abbr=on}}

| depth =

| max-depth = {{convert|148|m|ft|abbr=on}}

| volume =

| residence_time =

| shore = {{convert|8|km|mi|abbr=on}}

| elevation = {{convert|258|m|ft|abbr=on}}

| frozen =

| islands = none

| cities = Shiraoi

| reference = {{cite web|url=http://watchizu.gsi.go.jp/watchizu.aspx?b=423003&l=1411055|title=Topomap 25000:1 飛生|publisher=Geographical Survey Institute|language=Japanese|accessdate=2008-06-11}}

}}

{{nihongo|Lake Kuttara|倶多楽湖|Kuttara-ko}} is a nearly circular caldera lake in Shiraoi, Hokkaidō, Japan. It is part of Shikotsu-Tōya National Park. The lake is recognized as having the best water quality in all of Japan.{{cite web|url=http://www.town.shiraoi.hokkaido.jp/english/attracion/nature.in.shiraoi.htm|title=Nature in Shiraoi|publisher=Official Website of Shiraoi|accessdate=2008-06-11|archive-url=https://web.archive.org/web/20110927150945/http://www.town.shiraoi.hokkaido.jp/english/attracion/nature.in.shiraoi.htm|archive-date=2011-09-27|url-status=dead}} With a transparency of {{convert|19|m|ft}}, the lake ranks second to Lake Mashū according to the Ministry of the Environment.

File:Kuttara Volcano Relief Map, SRTM-1.jpg

Resident species of the lake include a salamander species, {{nihongo|Ezo salamander|エゾサンショウウオ|Ezo Sanshōuo}}. Since 1909, Sockeye salmon have been introduced to the lake.