Lake Biwa's forerunner Lake Oyamada emerged about 4 million years ago southeast of Shiga in Iga, Mie Prefecture. Over millions of years, at least two lakes formed and disappeared before Lake Katata (western Otsu) formed.

File information
Filename:	lb385-2014-07-09-144213.jpg
Album name:	philbert / Lake Biwa Museum 琵琶湖博物館
Keywords:	shiga / kusatsu / karasuma / peninsula / lake / biwa / museum / aquarium / fish
Filesize:	51 KiB
Date added:	Jul 09, 2014
Dimensions:	800 x 449 pixels
Displayed:	122 times
URL:	https://photoguide.jp/pix/displayimage.php?pid=54909
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