

Children of the Sea
海獣の子供
Ruka Azumi's ordinary summer vacation revolves around spending all her time on the handball court to avoid her only housemate, her alcoholic mother. When an incident at practice leads to Ruka's exclusion from the handball team, she is forced to find other outlets to enjoy herself, eventually winding up at the aquarium where her father works. There, she meets Umi, a mysterious boy raised by dugongs who is being kept at the aquarium in order to research his strange water-dependent body. Ruka and Umi become fast friends, and the pair is soon joined by Sora, Umi's brother who also has an unusual relationship with the ocean. Together, the trio explore a dazzling undersea world while learning about a peculiar "festival" that all sea creatures around the world are preparing for. [Written by MAL Rewrite]
Ruka Azumi's ordinary summer vacation revolves around spending all her time on the handball court to avoid her only housemate, her alcoholic mother. When an incident at practice leads to Ruka's exclusion from the handball team, she is forced to find other outlets to enjoy herself, eventually winding up at the aquarium where her father works. There, she meets Umi, a mysterious boy raised by dugongs who is being kept at the aquarium in order to research his strange water-dependent body. Ruka and Umi become fast friends, and the pair is soon joined by Sora, Umi's brother who also has an unusual relationship with the ocean. Together, the trio explore a dazzling undersea world while learning about a peculiar "festival" that all sea creatures around the world are preparing for. [Written by MAL Rewrite]
yenbus
June 7, 2019
Breathtaking and seamless animation. I'm glad they translated Igarashi Daisuke's art to the big screen pretty well. The art and the soundtrack is absolutely beautiful and I'm also a sucker for animes with the ocean/summer days/ fantasy aesthetic themes (reminded me of the anime Nagi no Asukara). Seeing it on the big screen gave me that same chest expanding feeling whenever I see amazing animation alongside moving soundtracks. Honestly, the storyline lost me a little bit but I'm not gonna say I wasn't entertained and absorbed. I would still highly recommend for the imagery. Can't wait until it is released in English to rewatch it!
nozomiEX
March 28, 2023

Kaijuu no Kodomo is the personification of a teenager smoking weed for the first time and spilling into incoherent babble about life and the universe. "Duuuuuuuuuuuuuude the seas and the stars are one... We're all, like, totally connected." Without any hint of self-awareness, prattling on about romantic-sounding yet entirely vacuous germs of ideas about "listening to the song on the winds," "we're all made of the same matter... whoaaaaaa..." and other such flowery, inconsequential drivel. The characters and plot are superficially there to laboriously drone on about shallow musings on life and the universe. What little there is in terms ofnarrative in the first half entirely falls away for a second half of self-indulgent spectacle, pretty to look at but utterly devoid of any substance, yet completely oblivious to how pompous it is. I really can't stress how cartoonishly self-aggrandizing this is. Don't bother watching it if you at all intend to pay attention. There are nice visual sequences in here but it's only surface-deep. This would be completely boring and unremarkable if it weren't for how outrageously pretentious it is.
5h1take
June 16, 2019
RIGHT OFF THE BAT!!! THIS REVIEW IS NOT SPOILER FREE!!!!!!! Not gonna lie I originally posted this review/report in a twitter thread but it's so detailed it deserves to be a review here. Due to this though, it's not in the standard review form. Report: Children of the Sea (film) Aaaaaaa I loved the film so so much (non manga reader)Overall it was a very solid movie (cont. SPOILERS) Disclaimer: this is all opinion!!! You can disagree!!! You can agree!!! Storyline The story was easy enough to follow but I could tell they'd removed a number of other plotlines in order to fit the main story into a short 110 minutes. The biggest example being the hinted abuse, exploitation and mistreated of Umi and Sora by the oceanographers. This missing plotline then tied in with the science of the boys' deteriorating physical condition, Joe's actions and disappearance towards the end of the film, and Anglade's relation to the happenings of the film, leaving many questions unresolved. The history of the "festival" is also left unsaid, adding more questions. Despite this, the movie still flows well and all of the things mentioned above come from my own observatory inclinations. Much is left out, but not enough to spoil the film for a non manga reader (me). The main story doesn't give quite enough information to become invested in the characters, namely the 3 leads. Sora and Umi (esp Sora) are gone almost as soon as they appear with how the film was paced. (Personal statement but Sora is a little shit and I love him for it). Animation Animation was above average but obviously not UBW level. The art (which is adapted well from page to screen) was the real breadwinner for this film. I will note, though, that the use of CG was done very nicely. CG is looking like the next big step in anime and this film is definitely a shuffle forward. That being said it could be thanks to the art and its compatibility to the medium. Art It must be said that the artwork and style of the film is absolutely breathtaking. The last 30 minutes of the film showcase some of the most gorgeous, detailed art I've ever seen in the medium, and I'd dare say that Children of the Sea challenged Itou Junji's oceanic masterpiece Gyo more than a few times, namely the deep sea shark that is showcased. Music (OST by Joe Hisaishi) Hisaishi composed for greats like Spirited Away, Laputa, other Ghibli classics and This Corner Of The World (drama). Unfortunately, his composition for Children of the Sea failed to capture me like it had countless times before. This was probably due to lack of "That One Track", that one work in the OST that manages to stick with you even after you've left the theatre. The reason for this track not existing within the Children fo the Sea soundtrack is due to Kenshi Yonezu's Umi no Yuurei. Despite this, the soundtrack still serves its purpose, and quite well at that. Subtle changes in tone between land and ocean made all the difference, and really added weight to the characters' movements depending on the setting at the time and scenes where the two tones met were truly majestic. Theme song The theme song of Children of the Sea is Umi no Yuurei (ghost of the sea) by Kenshi Yonezu, a song I've been raving about since its release before the film. You can tell Yonezu put a lot of love into the song, and its relation to Children of the Sea is undeniable with the lyrics seeming to be the words of Ruka for Umi and Sora whom she'll never "see" again, yet is forever tied to.It's so hard for me to not go crazy analysing Umi no Yuurei as there's so much I could talk about, but in the end I feel the best way to understand my overflowing emotions towards this song even before watching the film is to listen to it yourself. The one comment I will make it that Thank God Children of the Sea was able to live up to Yonezu's song, I was quite worried after DAOKO and Yonezu sung the theme for Fireworks (not full title), which ended up as a flop of a film, but I'm glad he wrote for such a good film. Final score If I had to give Children of the Sea a score out of 10, I, personally, would give it a 9/10 as it hit all my good spots but generally give it a 7.5/10 as it's heavily philosophical and symbolic, which I know peeves quite a few people.
johnbradshaw
February 25, 2020
Studio 4°C is very much a formidable studio in term of animation. Their movies often have a creative art style with realistic character designs and a light cold tone of color choices. Therefore, it's always a treat watching their works. But sadly, I can't say that the stories they offered are just as inspiring. And unfortunately, Kaijuu no Kodomo or Children of the Sea, as beautiful as it may look, is not an exception. Normally, this will be the part where I'm spoiling the story a little bit to help guiding the viewer into the anime. But this time, the story is just too incomprehensibleor quite frankly, a mess. And I really think that it's better for you to find out yourselves. For the length of a movie, the cast is reasonably rounded and works quite well. We got introduced to the 3 main lead and some minor side characters that doesn't leave much of an impression. But what I want to talk about is their dialogues, they always sound so vague and as invalid as possible. I figured that maybe the director wanted to remain the mystery to the end but even then, there's really no answer, no explanations of any kind and that really hangs me over the middle. As mentioned above, Kaijuu no Kodomo has one of the best animation I've ever seen. As comparable as Ufotable, Kyoani or Ghibli's works. Everything looks so fluid and beautifully detailed. Especially the characters' eyes and the scenery of the sea, they looks so lively but still remain the uniqueness of animated story. The music is also very reminiscent and bring a lots contribution in the overall tender and mysterious tone of the anime. Imo, no matter how great the animation can be, if its story fails to make the same impact, it's just such a shame because pieces of animation that's as beautiful as Children of the Sea is so rare to find nowadays. So if you're all for the story like me, Kaijuu no Kodomo is just not worth it.
HERMIT_PAIMON
August 13, 2025
Fantastic, top of the line, hand drawn-C.G.I. hybrid animation, and a story that was so much bigger than I was expecting. I thought I was in for a little story about some kids swimming around with dolphins, and whales. What I got was something more thematically inline with "Tree of LIfe" . It's a bit slow, but if you accept that and let yourself ride along then it's pretty good. Or you could just watch it in pieces. 4 degree studios really performed well in terms of art , music literally every details . Problem is that many people dislike children of sea because of poorplot theme ...It's too much philosphical for auidence who aren't into anime for a long time or in philosphical subjects/theories . So, there is always room to improve . Looking forward to watch more work from this studio . In last all i say don't watch if you aren't into philosphical aspects .
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