Deutzia yaeyamensis (ヤエヤマヒメウツギ, Yaeyama hime-utsugi) is a species of flowering plant in the family Hydrangeaceae that is endemic to Iriomote in the Yaeyama Islands, Okinawa Prefecture, Japan.

[2][3][4] The species was first described by Japanese botanist Jisaburō Ōi in 1938.

[2][3] Deutzia yaeyamensis is a deciduous shrub that grows to a height of approximately 1 metre (3 ft 3 in),[5][6] or to as high as 2 metres (6 ft 7 in).

[7] The oval to ovate leaves are finely serrated, while the ovoid winter buds open into clusters of some five to ten flowers, with white petals and dark yellow anthers.

[5][6][7] Deutzia yaeyamensis is endemic to Iriomote in the Ryūkyū Islands, where it may be found growing in sunny spots on the cliffs that flank the island's rivers.