★ 8.8 TV Series
Monster
Storyline
Based on a series of Chiikawa comics posted on X by Nagano from March to November 2023, known as the "Siren Arc". One day, while Chiikawa and Hachiware were relaxing in the square, Usagi suddenly appeared with a flyer stuck to its face. When Hachiware checked the flyer, it was an invitation reading “Special Invitation to a Special Island.” Lured by promises like “Get 100x rewards for simple island quests!” and “Limited-edition island ramen, exclusive sweets—sweet and spicy treats all practically free!”, Chiikawa and the others decided to go on the island retreat. Boarding the ship alongside Rakko, who was suspicious of the flyer's contents, the group landed on the island... only to find something waiting for them there...!? (Source: Official Site, translated)
Trailer
Characters & Japanese Voice Cast
Usagi
Main
VA: Ari Ozawa
Hachiware
Main
VA: Makoto Tanaka
Chiikawa
Main
VA: Haruka Aoki
Momonga
Supporting
VA: Yuka Iguchi
Rakko
Supporting
VA: Yuuma Uchida
Kurimanjuu
Supporting
VA: Takayuki Asai
Shisa
Supporting
VA: Miyuri Shimabukuro
Furuhonya
Supporting
VA: Harumi Momo
Siren
Supporting
VA: Minori Suzuki
Shimajirou
Supporting
VA: Tsuguo MogamiSeasons & Related Anime
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Frequently Asked Questions
How many episodes does Chiikawa: Ningyo no Shima no Himitsu have?
Chiikawa: Ningyo no Shima no Himitsu has 1 episodes.
Which studio made Chiikawa: Ningyo no Shima no Himitsu?
Chiikawa: Ningyo no Shima no Himitsu is produced by Cypic.
Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 17 October 2026, 5:23 AM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].