17 user 48 critic

Lu Over the Wall (2017)

Yoake tsugeru Rû no uta (original title)
1:36 | Trailer
The story centers on Kai, a gloomy middle school student whose life changes after meeting Lu, a mermaid.


Masaaki Yuasa
1 win & 2 nominations. See more awards »





Cast overview, first billed only:
Kanon Tani Kanon Tani ... Lu (voice)
Shôta Shimoda Shôta Shimoda ... Kai (voice)
Minako Kotobuki ... Yuho (voice)
Sôma Saitô Sôma Saitô ... Kunio (voice)
Shin'ichi Shinohara Shin'ichi Shinohara ... Lu's Father (voice)
Kenichi Suzumura ... Teruo (voice)
Shizuka Itô ... Isaki (voice)
Takayuki Sugô ... Chairman (voice)
Chô Chô ... President (voice)
Yutaka Aoyama Yutaka Aoyama ... Granny Octopus (voice)
Mutsumi Sasaki Mutsumi Sasaki ... Chief Priest of Shrine (voice)
Shingo Horii Shingo Horii ... Homeroom Teacher (voice)
Tomoyuki Shimura Tomoyuki Shimura ... Fuguda (voice)
Ryûji Mizuno Ryûji Mizuno ... Nodoguro (voice)
Takaaki Seki Takaaki Seki ... Kameda (voice)


New kid Kai is talented but adrift, spending his days sulking and isolated in a small fishing village after his family moves from Tokyo. When he demonstrates a proficiency at making music on his synthesizer, his classmates invite him to join their nascent garage band, but their practice sessions soon bring an unexpected guest: Lu, a young mermaid whose fins turn to feet when she hears the beats and whose singing causes humans to compulsively dance - whether they want to or not. Written by Anonymous

Plot Summary | Add Synopsis


Kimi no "suki" wa boku o kaeru (Your "like" will change me)

Motion Picture Rating (MPAA)

Rated PG for some peril and thematic elements | See all certifications »

Did You Know?


Michael Sinterniklaas (Kai) and Alyson Leigh Rosenfeld (Isaki) would later appear in Promare (2019) in which they voiced Vinny and Aina Ardebit respectively. See more »

Crazy Credits

Various marine animals swim about as the end credits crawl. See more »


Spoofs The Little Mermaid (1989) See more »


Performed by Yui (as YUI)
Lyrics and music by Yui (as YUI)
Arrangement by COZZi
See more »

User Reviews

Yoake tsugeru Rû no uta - NO Spoilers
20 September 2017 | by LiteKoiSee all my reviews

Lou and the Siren Island piqued my interest as soon as i saw the trailer. I'm far from being an anime or animation expert but I can say that I've watched a fair amount of Japanese anime, films or series. The overall style of the anime is certainly quite different from what I'm used to and that felt refreshing.

What I liked - The music worked really well with the anime and different scenes. I'm actually a tiny bit disappointed that they didn't exploit that aspect a bit more. The character design was simple, a bit hazy at times but it worked very well with the animation style that I enjoyed very much. The film also dares to do interesting things with animation, colours, visuals in general and that is very welcome. There are good vibrations in this film and overall it made me feel good. They also manage to make Lou, the siren, a very likable character, at least that's how I experienced it. Finally the whole mystery/mythology/mystic aspect of the Siren felt captivating to me at times and certainly entertaining.

What I liked less - I once again have a problem with character development as I didn't relate enough to the main character. He still had his moments but I needed a bit more from him for this film to have a significant emotional impact on me. The second thing that kinda disturbed me is how random some parts of this movies felt to me. Like it lacked some kind adhesive substance to make it all stick together in a more coherent form. Finally, the way the the main stakes of the movie are handled and ultimately resolved didn't really feel satisfactory to me. That last issue may come from the fact that the audience targeted could be a very young one (I'm 30) but it felt a bit "easy" and oversimplified to me. The way people react to the Sirens was also not realistic at all given that it's taking place in a similar world than ours. Then again, if the movie was intended for a very young audience that could explain that problem.

In the end it was a good experience and I'd recommend it for young kids or if you want to watch a rather simple story with interesting elements and good vibrations!

Verdict : 7.4/10. This rating isn't an attempt to evaluate the actual objective value of the film but merely reflects my own enjoyment of the work.

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Release Date:

19 May 2017 (Japan) See more »

Also Known As:

Lu Over the Wall See more »


Box Office

Opening Weekend USA:

$60,773, 13 May 2018

Gross USA:


Cumulative Worldwide Gross:

See more on IMDbPro »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:

Dolby Digital



Aspect Ratio:

1.78 : 1
See full technical specs »

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