While the anime is the best know part of the franchise, it is in fact adapted from the series of light novels The Most Irresponsible Man in Space by Hitoshi Yoshioka and published under Fujimi Shobo's Fujimi Fantasia Bunko label. The series is mainly split into a series of trilogies which cover both the anime story and further stories which have never been animated.

The Most Irresponsible Man in Space

  • Series 1
1. The Irresponsible Captain Tylor (Musekinin Kanchou Tylor)
2. The Most Irresponsible Man in the Meiji Period (Meiji Ichidai Musekinin Otoko)
3. Wang Strikes Back! (Wang no Gyakushuu)
  • Series 2
4. The Irresponsible Admiral Tylor (Musekinin Gensui Tylor)
5. Azalyn, Age 16 (Azalyn, 16-sai)
6. Tylor's Big Turnabout (Tylor no Daigyakuten)
  • Series 3
7. The Irresponsible President Tylor (Musekinin Daitouryou Tylor)
8. Wind Speed: 40 Light Years! (Fuusoku Yon-Juu Kounen)
9. The Eternally Irresponsible Man (Eiennare Musekinin Otoko)

The Most Irresponsible Man in Space Side Stories

1. The Galactic Age of Irresponsiblity (Ginga Musekinin Jidai)
2. The Samurai of Space (O-zora no Samurai)
3. The Scarlet Lion (Akaki Shishi)
4. Rebellion on Ice Planet Horoshiri! (Gentou Wakusei Horoshiri no Hanran)
5. Hatori-kun Time (Hatori-kun Taimu)
6. My name is Yamamoto (Waga mei wa Yamamoto)

The Irresponsible Kids

1. The Black Sun Belle (Ankoku Taiyou Komachi)
2. The Storm of "Why?" (Why? no Arashi)
3. Moete Kisara
4. Toki Saki Annainin
5. Ginga Yomeshu Monogatari
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