Shusui have been crossbred between Doitsu Koi and Asagi, and their points for appreciation,
therefore, are basically the same as those for Asagi.
Shusui
also have the tendency to show black spots in the head region as
they grow big. Koi with spotless head region are valued highly, of course.
The arrangement of scales is also
important. It is
desirable that scales are visible only the back and the regions of lateral lines -- no undesirable scales in any other place. Hi on the belly
covering over the lateral
lines are showy.