Broadcast date
01-04-1991 • 51 episodes
Elementary school children take control of giant robots to save the earth from the evil Jaku Empire.
Episodes of this season
1. Raijin-Oh Arrives
Eldran piloting the mecha Raijin-Oh crash lands into Hinobori's elementary school. With the last of his powers, Eldran saves the ones in the school at the moment: class 3 of the 5th grade. He entrust them with Raijin-Oh and the duties to protect the Earth, while Eldran goes into hibernation to recover his powers.
2. We Are the Earth Defense Class
Class 5-3 gets a visit from the army, demanding to hand over Raijin-Oh. The arguing is interruped when Jaku Beast Dustoron is running loose in the city. After finding out that only Class 5-3 can operate Raijin-Oh, the army has no choice but leave Class 5-3 alone.
3. Tests Are a Huge Annoyance!?
The entire Class 5-3 average match score of the last test is far below the rest of the other classes and needs to do a retest. Asuka, Kouji, Maria and Tsutomu are assigned to help Jin with his studies as his test score is zero. Jin tries to run away, but in the end can't escape.
The next day, right before the retest, Jaku Beast Testora appears and Class 5-3 needs to sortie. After defeating the Jaku Beast, Class 5-3 does the retest much to the dismay of Jin.
A couple of days later the tests are graded and Jin has 80 points.
4. Protect the Field of Flowers!
During an excursion, the boys of class 5-3 gets into a fight with the boys from the local. Meanwhile Kouji meets a girl called Kozue, who explains that the locals are angry that more and more trees are being cut for the expansion of the park for tourists.
The next day, Class 5-3 hears that Onoboori mountain (the place they went yesterday) became treeless and a Jaku Beast is attacking. Still remembering the fight, Jin is reluctant to sortie. Kouji insist, saying it's their duty as the defenders of Earth and manage to convince everyone including Jin. With the help of the locals Raijin-Oh manage to defeat the Jaku Beast.
5. Decision! Unrivaled Dragon Tail
6. Survive the Traffic War!
7. Taking Care of Drunkard
8. Absolute Union of Friendship!
9. Blowing Away Moldy Feelings
10. The Town Where Gasoline Vanished
11. Cookie's Nightmare
12. The Pool is Too Hot
13. Get Back the Baby!!
14. Final Match! Baseball
15. Fly at Mach 9!
16. Crash Course in Returning the Shot!
17. Teacher is a Jaaku Beast!?
18. Presentation! Earth Defense Class' Secrets
19. Seaside School is in Chaos!!
20. Maria has Disappeared!
21. The Enemy is Raijin-Oh!?
22. Departure! The Invincible Warrior
23. Come Forth! Absolutely Invincible Union!!
24. Dog/Cat Panic Plan!
25. Getting the Scoop!!
26. Great African Battle!
27. Defeat the Earthquake
28. Garuma's Competition of Fear!!
29. Appear! Super Jaaku Beast
30. Jaaku beast is a Friend?
31. Fierce Battle! Channel War
32. Adventure in the Haunted House
33. Terror! Dancing Jaaku Beast
34. Skiing is Too Cold
35. Vanished Commander
36. Jaaku Beast is an Ally of Justice!?
37. Graffiti Revolt
38. Psychic Jin
39. The Celebration is a Troubling Thing
40. Belzeb's Great Approach
41. Kidnapping of the Absolutely Invincible
42. Protect the Secret of the School!
43. Super Giant Reiko Appears!
44. Decisive Micro-Battle!
45. Broadcast! Earth Defense Class Facts!!
46. Taida Becomes an Earthling
47. Adult to Child Chaos!?
48. Transformation! Black Taida
49. Appear! Jaaku Empire
50. Defeat Emperor Warza!
51. Our Dreams are Absolutely Invincible!
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This season's cast
Rica Matsumoto
Jin Hyuga (voice)
Jin Hyuga (voice)
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Rie Iwatsubo
Asuka Tsukishiro (voice)
Asuka Tsukishiro (voice)
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Mari Maruta
Koji Hoshiyama (voice)
Koji Hoshiyama (voice)
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Konami Yoshida
Maria Shiratori (voice)
Maria Shiratori (voice)
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Mami Matsui
Hiroshi Takamori (voice)
Hiroshi Takamori (voice)
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Kyōko Minami
Kirara Haruno (voice)
Kirara Haruno (voice)
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Bin Shimada
Tsutomu Kojima / Eldran (voice)
Tsutomu Kojima / Eldran (voice)
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Saori Sugimoto
Miki Mano / Reiko Ikeda (voice)
Miki Mano / Reiko Ikeda (voice)
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Ai Satou
Aiko Shimada (voice)
Aiko Shimada (voice)
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Megumi Hayashibara
Ruruko Himeki (voice)
Ruruko Himeki (voice)
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Chisa Yokoyama
Ruriko Izumi (voice)
Ruriko Izumi (voice)
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Kumiko Watanabe
Youichi Fujinami (voice)
Youichi Fujinami (voice)
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Miki Ito
Etsuko Oomiya (voice)
Etsuko Oomiya (voice)
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Urara Takano
Minoru Yamaguchi / Reoni (voice)
Minoru Yamaguchi / Reoni (voice)
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