"Nagi" (Podocarpus nagi) belongs to Podocarpaceae (the Yellow-wood family). It is a tall evergreen tree that is distributed from westernmost of Honshu (Yamaguchi pref.) south to Shikoku and Kyushu, Okinawa-islands in Japan, and Taiwan, the Hainan island of China. This tall tree grows in the mountain slopes, and can reach about 20m in height. Birk is reddish-brown, and often shedding in large flake. Leaves are elliptic and opposite with fine parallel veins. From May to June, columnar male flowers and female flowers with 1-2 ovules are seen on the axils. Fruits are round drupes, ripen brown in fall.