The color rule for utsuri is good clean snow white, brilliant yellow, or deep red that is bright, uniform, has luster and has no black specks. This, together with a good bodyshape is the most important aspect to look at.
If we look at the first Utsuri, the bodyshape is not good. He is a bit to fat for it's size and age. The white is fairly clean, but not snow white. Bobby's Shiro has a perfect bodyshape and the shiro appers quite good.
The sumi, black, should be bright ebony. The color should be clean and the same color all over the body.
It is desirable for the kiwa to be as sharp as possible.
The pattern must include sumi on the head and should be balanced all over the body. My Utsuri does not have black on the head, but it will still come out despite the fact that she is already three years old. One can see the black underneath, although it does not appear on the photo. However, it should have more black on the head. Bobby's shiro has a good balance and nice pattern on the head, which will still develop into a type of desireable lightning strike.
There must be white (or yellow or red in the case of a hi or ki Utsuri) on the shoulder and head.
It should have a break between the body and tail (odome)
There must be motoguro on the pectoral fins. My Utsuri does not have enough.
A checkerboard pattern or stepping stone pattern is desirable and the sumi should make up about one-third of the body and the color, shiro, hi, or ki, will make up the remaining two-thirds of the body color.
A lightning strike or V pattern on the face is desireable.
The last rule for utsuri is that it must posses overall elegance, quality, and an imposing appearance.
Note: Sumi usually doesn't settle until the Utsuri reaches 4 or 5 years of age.
My Utsuri is not bad for a local bred, but only a nice pond fish, Bobby's Shiro is show quality.
The nice thing about a Shiro, is the contrast between snow white and black.
It is not uncommon for Shiro's to win the Grand Champion price, and is a very popular koi amongst serious hobbyists.
My logo represents the ultimate Shiro.