Quercus dentata, the Japanese emperor oak, also daimyo oak (Japanese: カシワ or 柏, kashiwa; simplified Chinese: 柞栎; traditional Chinese: 柞櫟; pinyin: zuòlì; Korean: 떡갈나무, tteokgalnamu) is a species of oak native to Japan, Korea and China. The name of the tree is often translated as "sweet oak" in English to distinguish it from Western varieties.