Genshi Shonen Ryu title

Genshi Shonen Ryu, or Ryu, the cave boy (原始少年リュウ Genshi shōnen Ryū) is the animated adaptation of Ryu no Michi that was produced by Toei Animation, it was broadcasted between 1971 to 1972 and consisted a total of 22 episodes. Shotaro Ishinomori was not satisfied with the omission of the science-fiction elements in the anime and later created his own manga adaptation of the story.


Set in primitive times, a baby with white skin is born into the world. As his skin color is different from the rest of the children around him, the baby is immediately disliked and alienated from the others. Deserted and left on his own, the baby is eventually picked up by an ape called Kitty and raised him as her child. The baby, Ryu, grows up to be a good man but at this moment, his adoptive mother is attacked and killed by the infamous dinosaur, Tyranno. In order to defeat Tyranno and also find his real mother, Ryu decides to set off on his own journey. In the midst of his travels, he meets the siblings Ran and Don. With his new-found companions, Ryu begins his battle against hardships and obstacles.

[1] [2]


Ep# Title card Title Airdate
1 Ryu ep1 title "Primitive Law" October 30, 1971
2 Ryu ep2 title "Terror of the Tyranno" November 13, 1971
  1. Primitive Law
  2. Terror of the Tyranno
  3. Taka's Revenge
  4. Pursuit full of Wounds
  5. The Yamaneko Tribe's Conspiracy
  6. Fight for the Hunting Grounds
  7. A Blood-stained Hero
  8. Fated Encounter
  9. Devil Stone
  10. Giant in the Blizzard
  11. Wrath of the Mountain God
  12. The Training of Misunderstandings
  13. Fire Trap
  14. Grave of the Heroes
  15. Paradise in the Southern Seas
  16. Human Beast
  17. Desperate Cry at the Cliffs
  18. The Uncontrollable Mammoth
  19. Barking Wolf
  20. Slave Hunt
  21. Human Fangs
  22. Towards Tomorrow


Opening themeEdit

  • "Genshi Shonen Ryu ga Iku" (原始少年リュウが行く)
    • Lyrics: Shotaro Ishinomori
    • Composer: Jun Oshio
    • Vocals: Ichiro Mizuki

Ending themeEdit

  • "Ran no Uta" (ランのうた)
    • Lyrics: Shotaro Ishinomori
    • Composer: Jun Oshio
    • Vocals: Mitsuko Horie
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