The Asagi are one of the first koi varieties. Ideally they should have a blue/gray base color with the edges of the scales outlined in white to form a net pattern. There should be orange or red on the belly extending up to the lateral line as well as the cheeks of the koi. The pectoral fins should also be red.

The Shusui are Asagi that have been crossed with a Doitsu mirror scale variety. They should have the red belly and cheeks but the skin above the lateral line should be a sky blue and the mirror scales along the dorsal fin should be even rows and a dark navy blue. Shusui with red that comes all the way up to the dorsal fin are called Hi Shusui.