"Hikage-inokozuchi" (Achyranthes japonica) belongs to Amaranthaceae (the Amaranth family). It is a perennial herb that is native from Honshu to Shikoku, Kyushu of Japan, as well as the Korean Peninsula, Taiwan and China. This herb grows in shady or semi-shady places of mountains and fields, and up to a height of 50-100 cm. Generally speaking, "Inokozuchi" refers to this species. The leaves are thinner than "Hinata-inokozuchi" (Achyranthes fauriei), and the flowering spikes are slender and sparse. The bisexual flowers are applied from August to October. The fruits have thorns that are carried on clothes and animal hairs. The Japanese name comes from the fact that wild boar children also bear this fruits.