The possible area were the Koshibito tribes lived.
The Koshibito (in Japanese, variously: 高志人, 古志人 or 越人, all pronounced identically) were a people of ancient Japan,[1] believed to have lived on the southern portion of the shore of the Sea of Japan[2] in the ancient province of Koshi during the Jōmon period.
^Transactions of the Asiatic Society of Japan. Vol. 37. 1965. p. 261.
^Nussbaum, Louis Frédéric. Japan Encyclopedia. Belknap Press, 2005. 563. Print.
The Koshibito (in Japanese, variously: 高志人, 古志人 or 越人, all pronounced identically) were a people of ancient Japan, believed to have lived on the southern...
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