"Nakiri-suge" (Carex lenta) belongs to Cyperaceae (the Sedge family). It is an evergreen herb that is distributed from Kanto region of Honsho west to Shikoku, Kyushu in Japan, the Korean Peninsula, China, and India. This herb grows on the forest floors and edges of warm forests and can reach 40-60 cm in height. The leaves are linear, crowding and form a large bush. The flowering stalks are born and bear spikes. At the tip of the spikelet is a group of male spikelets, and below that is a group of female spikelets. The Japanese name comes from the fact that the leaves are hard and rough enough to cut green leaves.