"Hitomoto-susuki" (Cladium chinensis) belongs to Cyperaceae (the Sedge family). It is a perennial herb that is distributed in Honshu, from the west of the Kanto region to Shikoku, Kyushu, the Korean Peninsula, southern China, and Southeast Asia. This herb grows on the coasts and the height of the culm is about 2 m. The leaves are broad linear and hard, and the length is about 1 m. It is also called "Shishikiri-gaya", because the blades of the leaves are strong and there are small spines, and the wild boar will be cut. Around July, a multi-part compound corymb is attached to the tip of the stem. The inflorescence has many brown spikelets.