Umi no Yami, Tsuki no Kage

Darkness of the Sea, Shadow of the Moon

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Alternative Titles

Synonyms: Umi-Yami
Japanese: 海の闇、月の影
English: Darkness of the Sea, Shadow of the Moon
More titles


Type: OVA
Episodes: 3
Status: Finished Airing
Aired: Oct 14, 1989
Producers: Movic
Licensors: None found, add some
Studios: Visual 80
Source: Manga
Genres: DramaDrama, HorrorHorror, RomanceRomance
Theme: Super PowerSuper Power
Demographic: ShoujoShoujo
Duration: 29 min. per ep.
Rating: R - 17+ (violence & profanity)


Score: 5.841 (scored by 573573 users)
1 indicates a weighted score.
Ranked: #102492
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #10883
Members: 2,239
Favorites: 1


Ranked #10249Popularity #10883Members 2,239
Add to My List
Episodes: /3


Ruka and Rumi Kobayakawa are twin sisters in love with the same man, athletic upperclassman Katsuyuki Touma. Rumi seems supportive of Ruka's fledgling romance with Katsuyuki, until the twins are infected with a strange bacterium that transforms Rumi's personality and gifts the twins with terrifying psychic powers. Now Rumi will stop at nothing - or no one, that gets between her and Katsuyuki, including her own twin sister...

(Source: ANN)


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Related Anime

Characters & Voice Actors


Dezaki, Tetsu
Fujiyama, Fusanobu
Sound Director
Tominaga, Tsuneo
Shibuichi, Setsuko
Storyboard, Character Design


Opening Theme

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Ending Theme

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Jun 28, 2023
This is one of those OVA’s that leaves me asking for more. It’s almost perfect in everyway and I’m not exaggerating. Many 80’s OVA’s range from mediocre to boring, this is definitely one of the diamonds in the rough.

REVIEW OF PLOT: The makers did the best they could’ve done in 3 episodes. Basically summarizing the first 3 volumes of the manga. The story is a simple concept that’s easy to get into. It takes inspiration of Tutankhamun where a bunch of girls find a grave site in a cave unleashing an ancient type of bacteria that infects our two main characters, twin sisters, Rumi and ...
Apr 21, 2022
“Umi no Yami, Tsuki no Kage” is a shoujo horror that has an intriguing premise, but unfortunately the execution is lacking.

This 3-episode OVA based on the manga of the same name centers on twin sisters Ruka and Rumi who both have a crush on the same guy named Katsuyuki. The twins get infected with a mysterious substance from an old burial site that imbues them with powerful psychic abilities whose strength seems to be tied to moon cycles. The infection also causes Rumi to undergo a dramatic personality change, and she becomes ruthless in attempts to kill Ruka so she can have Katsuyuki for herself. ...

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Recent News

Recent Forum Discussion

Poll: Umi no Yami, Tsuki no Kage Episode 3 Discussion
striperrela - Dec 24, 2019
5 repliesby Pistachiocookie8 »»
Jan 30, 2:29 PM
Poll: Umi no Yami, Tsuki no Kage Episode 1 Discussion
Daipyon - Dec 27, 2012
3 repliesby SnowxFlower »»
Mar 27, 2023 12:13 AM
Poll: Umi no Yami, Tsuki no Kage Episode 2 Discussion
Daipyon - Dec 27, 2012
1 repliesby fanty »»
Sep 24, 2013 4:01 PM