Hiroshige Koyama (born 1937) is a Japanese botanist specialist of Asteraceae.
Cytotaxonomic Studies of Compositae 3: On the Species Problems in Japanese Cacalia Hastata and Its Allies by Hiroshige Koyama - 1968On Cacalia Yatabei and Its Related Species by Hiroshige Koyama - 1968Taxonomic studies on the tribe Senecioneae of Eastern Asia by Hiroshige Koyama - 1969Phytogeography of Some Flowering Plants of the Tsushima Islands by Hiroshige Koyama - 1970Blumea Conspicua, as a Species Endemic to the Ryukyu Islands by Hiroshige Koyama - 1974Notes on some species of Chinese Cacalia 3 by Hiroshige Koyama - 1979Natural history researches of the Abukuma mountains and Its Adjacent Regions by Hiroshige Koyama, Hiroshige Koyama - 1995Flora and Fauna of the Imperial Palace, Tokyo by Hiroshige Koyama - 2000 