Lake Nakatsuna

{{Infobox lake

| name = Lake Nakatsuna

| image =Nakatsuna-lake.JPG

| alt =

| caption = Lake Nakatsuna in winter

| image_bathymetry =

| alt_bathymetry =

| caption_bathymetry =

| location = Ōmachi, Nagano, Japan

| coords = {{coord|36|30|N|137|51|E|region:JP_type:waterbody|display =inline,title}}

| lake_type = Eutrophic lake

| inflow =

| outflow =

| catchment =

| basin_countries =

| length =

| width =

| area = {{convert|12.5|ha}}{{cite web|url=http://wwwsoc.nii.ac.jp/jepsjmo/cd-rom/2000cd-rom/pdf/gb/gb-001_e.pdf|title=Climatic Records During Last 1500 Years in the Sediments of Lake Nakatsuna, Central Japan|last=Adhikari|first=Danda Pani|author2=Fujio Kumon|date=June 26, 2000|accessdate=December 22, 2010|archive-url=https://web.archive.org/web/20120305162424/http://wwwsoc.nii.ac.jp/jepsjmo/cd-rom/2000cd-rom/pdf/gb/gb-001_e.pdf|archive-date=March 5, 2012|url-status=dead}}{{cite journal|last=Adhikari|first=D.P.|author2=Kumon, F. . |date=December 2001|title=Climatic changes during the past 1300 years as deduced from the sediments of Lake Nakatsuna, central Japan|journal=Limnology|volume=2|issue=3|pages=157–168|doi=10.1007/s10201-001-8031-7}}

| depth =

| max-depth = {{convert|12|m}}{{cite web

|url = http://www.ilec.or.jp/database/asi/asi-32.html

|title = Kizaki-ko (Lake Kizaki)

|publisher = International Lake Environment Committee

|accessdate = December 22, 2010

|url-status = dead

|archiveurl = https://web.archive.org/web/20110523143123/http://www.ilec.or.jp/database/asi/asi-32.html

|archivedate = May 23, 2011

}}

| volume =

| residence_time =

| shore =

| elevation = {{convert|820|m|ft|abbr=on}}

| frozen =

| islands =

| cities = Near Omachi, Nagano, Honshū, Japan

| pushpin_map = Japan

| pushpin_label_position =

| pushpin_map_alt = Location of Lake Nakatsuna in Japan.

| pushpin_map_caption =

| website =

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}}

{{Nihongo|Lake Nakatsuna|中綱湖|Nakatsuna-ko}} is a lake in Ōmachi Nagano Prefecture, Japan. It is one of the "Nishina Three Lakes" (Lake Aoki, Lake Nakatsuna and Lake Kizaki). Its sediments have been studied in an effort to better understand climate change in Japan, finding evidence of the Medieval Warm Period and Little Ice Age.