S. Japan, S. Korea, Taiwan
Pollinated by flies. 
"Fatsia (Araliaceae) is a small genus of three species: F. japonica, F. polycarpa, and F. oligocarpella, which are endemic to the Archipelago of the western Pacific rim and Bonin Islands. Fatsia japonica (Japanese name: Yatsude) is native to southern Japan and commonly grown as an ornamental plant in warm temperate regions such as southern China. The plants have been used in various folk remedies. In traditional Chinese medicine, the leaves and roots of this plant have been used for the treatment of cough, rheumatic arthralgia, gout, and fractures." 
"On the Northwest coast of Italy, ornamentals and cut foliage are the main cultivated crops. Italian, European and North American markets show a big interest in such crops. Among cut foliage crops, Ruscus (Danae racemosa) and Fatsia (Fatsia japonica) are two of the most important." 
 Ye, X., Yu, S., Lian, X. Y., & Zhang, Z. (2014). Quantitative determination of triterpenoid glycosides in Fatsia japonica Decne. & Planch. using high performance liquid chromatography. Journal of Pharmaceutical and Biomedical Analysis, 88, 472-476.
 Sacco, M., Pasini, C., D'Aquila, F., Fadelli, P., & Tommasini, M. G. (2000). First experiences in Italy of IPM on ornamental cut foliage: Danae racemosa and Fatsia japonica. First experiences in Italy of IPM on ornamental cut foliage: Danae racemosa and Fatsia japonica., 23(1), 3-8.
 Tsuji, K., & Kato, M. (2010). Odor‐guided bee pollinators of two endangered winter/early spring blooming orchids, Cymbidium kanran and Cymbidium goeringii, in Japan. Plant Species Biology, 25(3), 249-253.