| Family | Rubiaceae |
| Scientific name | Galium japonicum Makino |
| Synonyms | Galium nipponium Makino; Galium trifloriforme Komarov var. nipponicum (Makino) Nakai |
| Common name | (Japanese common name) kuruma-mugura (クルマムグラ, 車葎 [meaning: wheel weed]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) Korea | |
| Habitat | Subalpine or mountane forest |
| Chromosomal number | unknown |
| Description | Plants electing 10-20cm tall, non hair. Leaves 6 verticillate, each leaflet 1-3cm long. Flowers white corollas ca. 2.5mm across, flowering in May to July. Perennial plants. |
| Reference | Galium japonicum Makino & Nakai |
| Galium japonicum Makino |
| June 2008 at Senjogahara Marsh |
June 2008 at Senjogahara Marsh |
June 2008 at Senjogahara Marsh |
| July 2009 at mountane streamside |
July 2009 at mountane streamside |