| Family | Urticaceae | 
| Scientific name | Elatostema japonicum Weddell | 
| Synonyms | Elatostema japonicum Weddell var. japonicum; Elatostema umbellatum Blume (var. umbellatum); Elatostema taquetii H. Léveillé; Pellionia umbellata (Blume) Weddell; Procris umbellata (Blume) Siebold & Zuccarini | 
| Common name | (Japanese common name) hime-uwabami-sou (ヒメウワバミソウ, 姫蟒蛇草 [meaning: dwarf big-snake weed]), mizu (ミズ [meaning: wet area weed]) | 
| (English common name) none | |
| Distribution | (Japan) Honshu (west of Kanto region), Shikoku, Kyushu | 
| (Other nations) none | |
| Habitat | Mountane wet forest | 
| Chromosomal number | unknown. | 
| Description | Plants 20-30cm tall. Leaves 3-6cm long. Flowers flowering in March to May. Perennial plants. | 
| Reference | Agent for hair growth (European Patent EP1915997/2008) | 
| Plant Germination Inhibitor And Method Of Use Thereof (US Patent 20070274956) | 
| May 2008 at Mt. Tsukuba | May 2008 at Mt. Tsukuba |