Some fossils were found around Lake Nojiri (Nagano, Japan) together with a lot of stone tools or bone tools.
"野尻湖層産カワニナ胎児殼化石について : 現生カワニナとの比較研究 "On the fossil embryonic shell of Semisulcospira libertina (GOULD) (Mesogastropoda: Pleuroceridae) from the latest Pleistocene Nojiri-ko Formation, Nagano Prefecture, Central Japan: A comparative study of recent and fossil Semisulcospira".
In 1965, facilities were expanded to include a location at Oiwake, Karuizawa, Nagano Prefecture and camp was established in 1970 at Lake Nojiri.
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