| Family | Urticaceae |
| Scientific name | Nanocnide japonica Blume |
| Synonyms | Nanocnide dichotoma S.S.Chien |
| Common name | (Japanese common name) katen-sou (カテンソウ, 花点草 [meaning: pin size flowers weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) China | |
| Habitat | Mountane wet forest or riverside |
| Chromosomal number | unknown |
| Description | Plants 10-25cm tall. Leaves 1-3cm long. Flowers very small, flowering in April to May. Perennial plants. |
| Reference | Nanocnide japonica Blume |
| Agent for hair growth (European Patent Application EP1915997/2008) |
| May 2009 at mountane forest edge |
May 2009 at mountane forest edge |
May 2009 at mountane forest edge |
| May 2009 at mountane forest edge |
May 2009 at mountane forest edge |