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.
For many of us, our ponds are beginning to warm (or will soon be). Water temperature, not the ambient air temperature, is the gauge for what to do and when to do it in regards to your pond. Water temperature should be checked at approximately 1 foot of depth. Avoid feeding your fish until the water temperature is consistently above 50 degrees Fahrenheit. This will also be the time to start adding spring maintenance bacteria and enzyme treatments.