The keyword references a specific production from the Japanese adult video (JAV) industry. This release features actress Uta Kohaku performing under a specialized fetish theme.
Uta Kohaku, the performer in question, is known within certain circles for her involvement in adult entertainment. The addition of "Urination Ballerina" to her name in this context hints at the specific theme of the video, which combines elements of ballet, a traditionally elegant and disciplined art form, with an act that is generally considered taboo or fetishistic. FSET 319 Uta Kohaku Urination Ballerina