PROBLEM TO BE SOLVED: To provide a Klf4 expression induction method and a Klf4 expression inducer.SOLUTION: The present invention relates to a Klf4 expression induction method comprising the step of bringing a cell into contact with a carbonyl compound, and a Klf4 expression inducer comprising a carbonyl compound.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】Klf4発現誘導方法およびKlf4発現誘導剤を提供する。【解決手段】細胞をカルボニル化合物に接触させる工程を備えるKlf4発現誘導方法、およびカルボニル化合物を含むKlf4発現誘導剤。【選択図】図1