O Yuki Conjugate is an English post-industrial/ambient musical group founded in 1982 in Nottingham by Roger Horberry and Andrew Hulme. Their musical approach is self-described as dirty ambient and wilfully obscure. The music is atmospheric and eclectic, using electronics and found instruments. Their music has been variously described as ambient, fourth-world, ethnic, tribal, and darkwave.

OYC MK I (1982-1991): C.Elliott/R.Horberry/T.Horberry/A.Hulme
OYC MK II (1991-1996): R.Horberry/A.Hulme/M.McGeorge/D.Mudford/P.A.Woodhead/J.Gardiner
OYC MK III (2001-2008): R.Horberry/A.Hulme/R.Jenkins
OYC Mk IV (2017-present): R.Horberry/A.Hulme