E. japonica

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