红淡比（学名： Cleyera japonica）为肖柃属常绿乔木。日本称之为榊。

常绿乔木，高约12公尺，树干淡灰褐色，叶为卵状椭圆形。花期为每年1-6月，花单立或几朵簇生，两性花。

Cleyera japonica (sakaki) is a flowering evergreen tree native to warm areas of Japan, ******, China, Myanmar, Nepal, and northern India. It can reach a height of 10 m. The leaves are 6–10 cm long, smooth, oval, leathery, shiny and dark green above, yellowish-green below, with deep furrows for the leaf stem. The bark is dark reddish brown and smooth. The small, scented, cream-white flowers open in early summer, and are followed later by berries which start red and turn black when ripe. Sakaki is one of the common trees in the second layer of the evergreen oak forests. It is considered sacred to Japanese Shintō faith, and is one of the classical offerings at Shintō shrines.