| Family | Amaranthaceae |
| Scientific name | Achyranthes japonica (Miquel) Nakai var. hachijoensis Honda |
| Synonyms | Achyranthes bidentata Blume var. hachijoensis (Honda) Hara |
| Common name | (Japanese common name) hachijo-inokodzuchi (ハチジョウイノコヅチ or ハチジョウイノコズチ, 八丈猪子槌 [meaning: Hachijo Island inokodzuchi (inokodzuchi = a kind of traditional detoxicant weed)]) |
| (English common name) Japanese chaff-flower | |
| Distribution | (Japan) Honshu (west of Kanto region), Shikoku, Kyushu, Okinawa |
| (Other nations) Taiwan | |
| Habitat | Roadside or forest edge near seaside |
| Chromosomal number | unknown |
| Description | Plants 80cm. Leaves 5-12cm long. Flowers flowering in August to September to October. Prennial plants. |
| Reference | Achyranthes japonica (Miq.) Nakai var. hachijoensis Honda |
| Achyranthes japonica (Miquel) Nakai |
| October 2007 at Tsukuba Botanical Garden |
October 2007 at Tsukuba Botanical Garden |
October 2007 at Tsukuba Botanical Garden |