Variant right inferior adrenal arterial supply to caudate lobe HCC is rare and may be overlooked. We report a 53-year-old man with recurrent caudate lobe HCC after 12 TACE sessions. During the 13th TACE, cone-beam CT of the common hepatic artery did not reveal tumor vascularity. At the 14th TACE, performed 3 days later, the right inferior phrenic artery, the most common extrahepatic collateral feeder to caudate lobe HCC, showed no tumor supply. Angiography and cone-beam CT from a small aortic common trunk giving rise to a variant right inferior adrenal artery and the right renal capsular artery revealed predominant supply from the variant right inferior adrenal artery. Embolization through these branches achieved compact iodized oil uptake without immediate complications.