picea jezoensis (sometimes misspelled picea yezoensis), the dark-bark spruce, ezo spruce, yezo spruce, or jezo spruce, is a large evergreen tree growing to 30–50 m tall and with a trunk diameter of up to 2 m. it is native to northeast asia, from the mountains of central japan and the changbai mountains on the china-north korea border, north to eastern siberia, including the sikhote-alin, kuril islands, sakhalin and kamchatka. it is found in cold but humid temperate rain forests, and nowhere does its range extend more than 400 km from the pacific ocean. the specific epithet "jezoensis" derives from ezo, an old name for hokkaido and other islands north of the japanese island of honshu, where the species is found.