Doitsugoi is a variety that was produced by crossbreeding Nishikigoi in Japan with a carp that has almost no scales that was bred for edible purposes in Eastern Europe including Germany. Except for the back and both sides, it has almost no scales and the skin is exposed. There are varieties such as Doitsu-kohaku, Doitsu-taisho-sanshoku, and Doitsu-showa-sanshoku.
Compared to common Nishikigoi, which have scales covering almost the entire body (Wagoi called in Japan), Doitsugoi are characterized by their brighter and more vivid colors. A good Doitsugoi is one that has a clear boundary between the color of the skin and the pattern called Kiwa in Japan.

JAS No.2011 Doitsugoi
Doitsugoi has almost no scales on the whole body and the skin is exposed.

Doitsu-kohaku has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Kohaku.

Doitsu-taisho-sanshoku has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Taisho-sanshoku.

Doitsu-showa-sansyoku has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Showa-sanshoku.

Doitsu-shiroutsuri has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Shiroutsuri.

Doitsu-goshiki has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Goshiki.

Doitsu-ochiba-shigure has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Ochiba-shigure.

Doitsu-midorigoi has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Midorigoi.

Doitsu-ai-goromo has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Ai-goromo.

Doitsu-budo-goromo has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Budo-goromo.

Doitsu-shiro-bekko has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Shiro-bekko.

Doitsu-aka-bekko has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Aka-bekko.

Doitsu-hiutsuri has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Hiutsuri.

Doitsu-kiutsuri has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Kiutsuri.

Doitsu-aka-muji has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Aka-muji.

Doitsu-shiro-muji has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Shiro-muji.

Doitsu-kigoi has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Kigoi.

Doitsu-chagoi has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Chagoi.

Doitsu-chautsuri has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Chautsuri.

Doitsu-karashigoi has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Karashigoi.

Doitsu-karasugoi has almost no scales on the whole body and the skin is exposed, and has the appearance characteristics of Karasugoi.