Ryuichi Kosugi (小杉 竜一, Kosugi Ryūichi, born 5 July 1973) is a Japanese comedian born in Kyoto who performs tsukkomi in the comedy duo Black Mayonnaise along with his partner Takashi Yoshida. His standing position is in the left. He is represented by Yoshimoto Kogyo.
Birthday: July 05, 1973
October 10, 2021
April 06, 2017
July 27, 2003
May 16, 2020
December 25, 2001
March 11, 2022
January 01, 2021
July 07, 2017
August 12, 2010
October 24, 2012
October 21, 2013
October 05, 2021
