Asura · Buddhist · Southeast Asia · Koshigoe and Enoshima, Kanagawa, Japan
Gozuryu, the five-headed dragon
The five-headed dragon of the Enoshima Engi (1047), who lived in a lake near the villages and harmed them for a thousand years, fell in love with Benzaiten when she raised her island from the bay, was refused until he reformed, and became the hill called Dragon's Mouth, facing her island.
Sources: Enoshima Engi (Wikipedia); The Legend of Enoshima: the tale of Gozuryu and Benzaiten (Donny Kimball, travel essay) · see Gozuryu, the five-headed dragon's web