The Kawarimono classification accommodates all non-metallic koi that do not fall in any of the other varieties. It includes koi that are a result of a cross between different varieties and others whose exact lineage is uncertain.

Karasugi
Some of the most sought after koi in the Kawarimono group come from Karasu lineage. Karasugoi are black koi with white or orange bellies. The sumi is ebony in colour and darker than that of a Magoi.

Hajiro: This is a black koi with white tips to its caudal and pectoral fins.
Hageshiro: This koi has not only white tips to its caudal and pectoral fins, nut also a white head and nose.
Yotsushiro: This relatively rare koi has a white head and white caudal and pectoral fins.
Matsukawa-bake: The pattern of the black and white koi changes with the time of the year and water temperatures.
Kumonryu: Its a black and white pattern, completed by large Doitsu scales.
Sumi-nagashi: This is a very subtle koi whose black scales are outlined in white.

Matsuba-goi
The koi that are included in the this variety are single coloured, non-metallic with a matsuba (pine-cone) pattern in the scales along the back.

Aka Matsuba: This is a red koi with black markings in the centre of the scales.The red head should have no black markings or speckling.
Ki Matsuba: This is a yellow koi with black markings in the centre of the scales.The yellow head should have no black markings or speckling.
Shiro Matsuba: This white koi has a black pine-cone patterning in the scales.

Kage Utsuri and Showa
Kage varieties of koi have a blurred, reticulated black pattern over the white or hi of a koi.

Kage Shiro Utsuri: This variety has the basic black and white utsuri pattern with the kage, shadowy, reticulated pattern over the white of the body.
Kage Hi Utsuri: This variety has the red and black utsuri pattern with the kage, shadowy, reticulated pattern over it.
Kage Showa: This has the basic Showa markings with the Kage pattern over the white of the koi.

Kanoko-goi
Kanoko means ‘fawn’ and refers to the dappled pattern of hi found on some koi.

Kanoko Kohaku: The hi markings are dapples but the hi markings on the head almost remains solid.
Kanoko Sanke: This is a Sanke whose hi markings are dappled rather than solid.
Kanoko Showa: Its is rare to find good dappled markings on a Showa.

Shusui Hybrids
They all have the basic blue colouration of the Shusui on the body, on which the markings of another variety are superimposed.

Sanke Sushui: The pattern is underlaid with the blue black of the traditional Shusui.
Bunka Sanke: This is a blue Sanke with shiny pectoral fins.
Showa Shusui: This has the strong sumi pattern with the underlying blue.
Goshiki Shusui: It is a non-metallic blue Goshiki.

Single Coloured Koi
The following varieties are single coloured non metallic koi.

Ki-goi: This is a bright yellow koi.
Cha-goi: This is a light brown koi.
Sora-goi: Grey-blue koi.
Midori-goi: Green koi.
Shiro-muji: This non-metallic white koi is derived from Kohaku. Such koi are usually discarded, but can be surprisingly impressive.
Aka-muji: Non-metallic red koi.
Beni-goi: Deeper red koi.
Aka Hajiro:This is a Aka-muji with white tips to its pectoral and caudal fins.

Other Kawarimono include:

Hi-botan: This koi is derived from Utseri lineage and has a pattern that resembles Bekko. There are no sumi markings on the head but those on the body are much larger than on a bekko.
Ochiba-shigure: This koi is blu-grey in colour, with a brown pattern.