is a Japanese comedian who performs ''tsukkomi'' in the comedy duo Black Mayonnaise. His standing position is on the left. His partner is Takashi Yoshida (comedian), Takashi Yoshida.
Kosugi is represented with Yoshimoto Kogyo. He graduated from Kyoto Prefectural Katsura, Kyoto, Katsura High School.
In 12 November 2010 Kosugi married a former dental assistant from Osaka Prefecture.
Filmography
; TV programmes
; TV anime
; Films
; Advertisements
Bibliography
References
{{DEFAULTSORT:Kosugi, Ryuichi
Japanese comedians
Japanese people of American descent
People from Kyoto
1973 births
Living people