A novel organometallic complex and a novel light-emitting device are provided. An organometallic complex represented by General Formula (G1) is provided. Note that in General Formula (G1), each of Z1, Z2, Z3, and Z4 independently represents carbon or
nitrogen, and at least one of them represents
nitrogen. When any of Z1, Z2, Z3, and Z4 represents carbon, the carbon has
hydrogen (including
deuterium) or a
substituent, and the
substituent is any one of an
alkyl group having 1 to 10 carbon atoms, an
alkoxy group having 1 to 10 carbon atoms, a silyl group having 1 to 20 carbon atoms, a substituted or unsubstituted
aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and a cyano group. Each of R1 to R18 independently represents any one of
hydrogen (including
deuterium), an
alkyl group having 1 to 10 carbon atoms, an
alkoxy group having 1 to 10 carbon atoms, a silyl group having 1 to 20 carbon atoms, a substituted or unsubstituted
aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and a cyano group.