HIKARI MUJI (also called Hikarimono)

Hikari means metallic and muji means self-colored or literally 'nothing else'. They are single colored koi with a metallic sheen to the skin. You can tell best if a koi is metallic by looking at the head. Since koi don’t have scales on their head it’s easy to see if the skin is metallic. One of the koi in this class is the Gin Matsuba and the black pine cone markings in the center of the white scales make it a two colored koi but they are in the Hikari Muji class anyway.