||This article possibly contains original research. (July 2009)|
Hiroshi "Monsieur" Kamayatsu (かまやつひろし Hiroshi "Monsieur" Kamayatsu?, born January 12, 1939) is a Japanese singer and guitarist born in Tokyo.
"Monsieur" has been a member of Vodka Collins, and also a solo act.
In recent years he had a reunion with some former members of The Spiders, as the band Sans Filtre. Among his recent work is his performance of the song "RTB", the ending song to the anime Sentou Yousei Yukikaze.
He has been performing for over five decades.