• In ancient Japan, thunder was thought to be caused by a deity named "Raijin", the god of lightning ("rai" meaning thunder and "jin" meaning god or spirit). However, this monster lacks the circle drum and drum sticks the deity is often depicted carrying shown by other Thunder monsters like "Thunder Nyan Nyan".
  • This card has a female counterpart, "Rai-Mei".
  • This is one of the few cards whose Japanese name consists entirely of English alphabetical characters and punctuation.
  • This is the first card in all of Yu-Gi-Oh! with a ? stat for its ATK that does not explicitly mention the value of it in its card text. "Holactie the Creator of Light" has a similar property.
    • Despite not mentioning directly, however, "Rai-Jin" can still value the ? stat based on its own effect. The only way "Holactie" cannot is because it ends the game as soon as it is Special Summoned.
  • This monster, and Kasha are the only cards in the entire game with a ? ATK value, and a non-zero/non-variable DEF value. In this case, they both share the same common DEF of 1000.

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