Gen-ichi Koidzumi

was a Japanese botanist, author of several papers and monographs on phytogeography including work on roses and Amygdaloideae (Rosaceae), maples (Aceraceae), mulberries (the genus Morus), and many other plants. His name is sometimes transliterated as Gen’ichi or Gen-Iti, or as Koizumi.

Biography Gen-ichi Koidzumi was born in Yonezawa in Yamagata Prefecture in 1883. After graduating from the Sapporo Agricultural College, he studied biology at Tokyo Imperial University from 1905, continuing his studies there under Matsumura Jinzō, and receiving his doctorate in 1916. Koidzumi died in his hometown of Yonezawa in 1953.

Published works 1956. Plants of Jaluit Island (Pacific surveys report / U.S. Army, Corps of Engineers, Far East) 1952. The Big Button Palm which produces the ivory nut ([Reports] - USGS, Pacific Geological Surveys) 1930. , 115 pp. 1928. Plantae Novae Amami-Ohsimensis nec non Insularum adjacentium: 1 Phytogeographical notes on the flora of the Loochoo Archipelago. 2 Description of new species. 19 pp.