This paper describes the nucleotide sequence and genome organization of a novel RNA virus detected in grapevine (Vitis vinifera) cultivar 'Kizil Sapak' by high-throughput sequencing (HTS) and tentatively named "grapevine virus J" (GVJ). The full genome of GVJ is 7,390 nucleotides in length, which comprises five open reading frames (ORFs), including a 20K ORF (ORF 2) between the replicase (ORF 1) and the movement protein (ORF 3) genes. According to the level of sequence homology and phylogenetics, GVJ is proposed as a new member of the genus Vitivirus (subfamily Trivirinae; family Betaflexiviridae), with the closest characterized virus being grapevine virus D (GVD).