noun
Usage: usually capitalized J
: any of several oaks that are native to, grown in, or shipped as timber from Japan: as
a. : an evergreen oak ( Lithocarpus glabra ) closely related to and resembling the tanbark oak of the American Pacific coast
b. : any of several oaks of the genus Quercus (especially Q. grosseserrata ) with moderately light, fine-grained, even-textured wood