An object of the present invention is to provide an endodermal cell population for obtaining optimal somatic cells as cell therapy preparations. The endodermal cell population of the present invention has a reduced content proportion of undifferentiated cells in the cell population and contains endodermal cells differentiable into optimal somatic cells as cell therapy preparations. Further, a somatic cell derived from the endodermal cell population of the present invention has excellent therapeutic effects as a cell therapy preparation.
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