Dielectric ceramic composition and ceramic electronic device

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A dielectric ceramic composition comprising a compound expressed by a formula of ABO3, where “A” is Ba alone, or Ba and at least one selected from Ca and Sr, and “B” is Ti alone, or Ti and Zr, and having a perovskite-type crystal structure, and an oxide of a rare-earth element including Sc and Y. The dielectric ceramic composition includes a dielectric particle having a core-shell structure which has a core and a shell, the shell being present around the core and including at least “R” element, and in the shell, a region showing a maximum content rate of “R” element is a boundary region between the core and the shell.