Acer shirasawanum (Shirasawa's maple or fullmoon maple; Japanese: オオイタヤメイゲツ ooitayameigetsu) is a species of maple native to Japan, on central and southern Honshū (Fukushima Prefecture southwards), Shikoku, and Kyūshū. It can be distinguished from its close relatives Acer japonicum and Acer sieboldianum by its hairless shoots; from A. sieboldianum also by its red, not yellow, flowers. Some authorities, especially in horticulture, still use the older classification including the species in A. japonicum; many specimens in cultivation also remain mislabelled as A. japonicum.