Nihon (plant)

Nihon is a genus of flowering plants in the family Boraginaceae. It includes five species native to Japan (5 species) and Korea (1 species).
 * Nihon akiensis (Kadota) A.Otero, Jim.Mejías, Valcárcel & P.Vargas – Japan (Honshu)
 * Nihon japonicum (Thunb.) A.Otero, Jim.Mejías, Valcárcel & P.Vargas – central and southern Japan
 * Nihon krameri (Franch. & Sav.) A.Otero, Jim.Mejías, Valcárcel & P.Vargas – southern Korea and Japan (southern Hokkaido and northern and central Honshu)
 * Nihon laevispermum (Nakai) A.Otero, Jim.Mejías, Valcárcel & P.Vargas – Japan (central Honshu)
 * Nihon proliferum (Ohwi) A.Otero, Jim.Mejías, Valcárcel & P.Vargas – Japan (western and central Honshu)

The species in the genus were previously placed in genus Omphalodes. A 2014 phylogenetic study concluded that these five formed a distinct lineage. The new genus was given the name Nihon, the Japanese name for Japan.