Core-shell type CeO2/ZrO2 (csCZ) support was investigated as a novel item for reducing platinum content in three way catalysts (TWC). A composite csCZ support was characterized by X-ray diffraction, scanning transmission electron microscopy and energy dispersive spectroscopy. The analysis revealed that the dispersed phase of CeO2 appeared to form a relatively thin layer and aggregates on the surface of ZrO2. Pt-concentrated areas and agglomerate were stabilized on the areas that were Ce-rich on ZrO2 core particle. The H-2-TPR profile of Pt/csCZ with Pt content of 0.1 and 0.01 wt.% showed single peak in each reaction temperature, demonstrating extremely active than those of Pt/CeO2-NPs, when the same low content Pt loading samples were compared. 0.1 wt.% Pt/csCZ showed better activity than that of 0.1 wt.% Pt/CeO2, and TWC activities of low content Pt catalyst are enhanced by designed nanostructured core-shell type CeO2/ZrO2 support. The agglomeration of Pt will be inhibited due to the separated morphological feature of CeO2 NPs on ZrO2, which bring an important effect of csCZ support on Pt reduction.