Raijū (雷獣)

Name Meaning

Raijū (雷獣) means “thunder beast” or “lightning beast.” It is believed to be a creature born from lightning and storm clouds.

  • Rai (雷) = Thunder
  • Jū (獣) = Beast or animal

Origin

  • Described in Edo period naturalist texts and folklore.
  • Closely associated with Raijin, the thunder god, as his companion or mount.

Appearance

  • Looks like a cat, dog, weasel, or tanuki enveloped in lightning.
  • Sometimes described as having a body of lightning or glowing fur.

Behavior & Myths

  • Falls from the sky during thunderstorms.
  • Likes to curl up and sleep in the belly of sleeping people, leading to the myth that Raijin would strike them with lightning to wake it up.
  • Feared and revered during storms.

Symbolism

  • Represents raw elemental energy and sudden divine presence.
  • Seen as a sign of Raijin’s power and judgment.
Raijū thunder beast
Lightning creature Raijū