Uyama Hiroto (宇山寛人) is a Japanese multi-instrumentalist and producer signed to the Hydeout Productions label run by Nujabes. He has frequently collaborated with Nujabes, producing "Letter From Yokosuka", playing additional instruments on the tracks "Kumomi", "Next View" & "Modal Soul", releasing remixes of "Highs 2 Lows" & "Thank You", and contributing tracks to the compilation album Hydeout Productions 2nd Collection. Uyama Hiroto's solo album "A Son of the Sun" was released in July 2008.