E. japonica may refer to: Eisenia japonica, an earthworm species in the genus Eisenia Eriobotrya japonica, the loquat, a fruit tree species indigenous to southeastern China Eriocheir japonica, a crab species in the genus Eriocheir Eristalis japonica, a hoverfly species in the genus Eristalis Eristalinus japonica, a hoverfly species in the genus Eristalinus Euaresta japonica, a fruit fly species Eubalaena japonica, the North Pacific right whale, a very large robust baleen whale species that was common in the North Pacific Eurya japonica, an ornamental plant species Synonyms Eutrema japonica, a synonym for Wasabia japonica, the wasabi or Japanese horseradish, a cultivated plant species See also Japonica (disambiguation)