Ryūjin (龍神村 Ryūjin-mura) was a village located in Hidaka District, Wakayama Prefecture, Japan. As of 2003, the village had an estimated population of 4,416 and a density of 17.31 persons per km². The total area was 255.13 km². On May 1, 2005, Ryūjin, along with the town of Nakahechi, the village of Ōtō (both from Nishimuro District), and the town of Hongū (from Higashimuro District), was merged into the expanded city of Tanabe.