Oyamazumi no Kami is a mountain deity in Japanese Shinto tradition, regarded as one of the primary kami governing mountains and the natural forces associated with them. Enshrined most notably at Oyamazumi Shrine on Omishima Island in Ehime Prefecture, this deity has historically been venerated by sailors, warriors, and travelers seeking protection when crossing mountainous or perilous terrain and waterways. Devotees have traditionally sought this kami's favor for safe passage, reflecting the deity's broader association with the natural landscape and the challenges of travel through it.