Some fossils were found around Lake Nojiri (Nagano, Japan) together with a lot of stone tools or bone tools.
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In 1860, the first fossil record was found at Yokosuka and the bottom of Seto Inland Sea, Japan.
One of the fossils Naumann examined from modern-day Tokyo proved to be a previously unknown extinct species, which was named in his honor: Palaeoloxodon naumanni).