Ilex crenata (Japanese Holly or Box-leaved Holly; Japanese: イヌツゲ inutsuge) is a species of holly native to eastern China, Japan, Korea, Taiwan, and Sakhalin. It is an evergreen shrub or small tree growing to a height of 3-5 m (rarely 10 m) tall, with a trunk diameter up to 20 cm. The leaves are glossy dark green, small, 10-30 mm long and 10-17 mm broad, with a crenate margin, sometimes spiny. The flowers are dioecious, white, four-lobed. The fruit is a black drupe 5 mm diameter, containing four seeds. It grows well in acidic soil, between a pH of 3.7 and 6.0.