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★ 6.0AniList score
1Episodes
38 minPer episode
The anime's original story features Mutta and Hibito during one summer when they were children. During the summer when Mutta and Hibito made their promise to go to space, they met a young girl who also had a… Read more
Storyline
The anime's original story features Mutta and Hibito during one summer when they were children. During the summer when Mutta and Hibito made their promise to go to space, they met a young girl who also had a wish. (Source: Anime News Network)
Characters & Japanese Voice Cast
Mutta Nanba
Main
VA: Miyuki Sawashiro
Hibito Nanba
Main
VA: Yuuko Sanpei
Hikari
Main
VA: Fumiko OrikasaSeasons & Related Anime
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Frequently Asked Questions
How many episodes does Planetarium Uchuu Kyoudai: Itten no Hikari have?
Planetarium Uchuu Kyoudai: Itten no Hikari has 1 episodes.
Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 17 October 2026, 12:54 AM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].