Larry, these three will be entered in different categories. Kumonryu will be entered in Doitsu B, Kikusui as mentioned by JR in Hikaimoyo (or in some shows in Doitsu B, depending on the show). Only the Hajiro will be in Kawarimono.
Bern, since Bekko and Hikari-Utsuri will be two classes that will not have very many entrants, especially in a closed show, it seems logical to enter them in another category. But putting these two together, ie a non-metallic and a metallic category, won't you be comparing apples with oranges. IMHO it would be more logical to enter the Hikari-Utsuri in Hikarimoyo and Bekko in Kawarimono.
In the Holland Koi Show in Arcen, there is a seperate class (Kawarimono II) for Chagoi, Soragoi and Ochiba Shigure, in an effort to get them entered into the show. Before the number of entries of these three variëties were minimal because they were beaten time and time again by more "exciting" variëties.