Raijū (雷獣) (thunder beast) were believed to inhabit rain clouds and occasionally fall to earth during lightning strikes. This raijū is described as crab-like with a coat of black fur and fell from the sky during a violent storm on the night of June 15, 1796 in Higo-kuni (present-day Kumamoto prefecture)
The raijyu is a legendary creature from Japanese mythology. Its body is composed of lightning and may be in the shape of a cat, fox, weasel, or wolf. The form of a white and blue wolf (or even a wolf wrapped in lightning) is also common. It may also fly about as a ball of lightning (in fact, the creature may be an attempt to explain the phenomenon of lightning). Its cry sounds like thunder.