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Music / cosMo

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cosMo, also called Bousou-P after one of his more popular works, is an animator and prominent Vocaloid composer. He has become famous in the Vocaloid community for producing a vast number of extremely fast-tempo songs (often over 200 bpm), pushing the software to its limits. He has composed music sung by Hatsune Miku, Kagamine Rin and Len, Megurine Luka, Gumi, and Gakupo; while most of cosMo's works are Miku songs, he claims that his favorite Vocaloid is Kagamine Len.

He does a number of his illustrations himself, and also has personally covered a number of Vocaloid songs. cosMo is said to have an unusually "cute" voice for a male singer. (Judge for yourself.) In fact, he released a Vocaloid cover CD called "What Do You Mean You're Gonna Sing?!!", in which he covers a number of his own works.


cosMo has produced three series—the Fantastic Garden series, its sequel The Star Girl and the Illusion Paradise, and The Disappearance of Hatsune Miku, which is responsible for his leap to fame. He has produced a number of mini-albums, and his songs are often included in Miku compilation CDs. Fantastic Garden is known for being extremely surrealist, and The Disappearance of Hatsune Miku chronicles the experience of what life is like for an actual Vocaloid program with a merciless eye. The Disappearance series, along with a few new songs, has been released as a full-length CD which will also be cosMo's major debut. The album has also spawned a light novel written by cosMo himself in 2013.

In addition to Vocaloid songs, cosMo also produces songs for Doujin music label Diverse System and several BEMANI games, including Sound Voltex and beatmania IIDX. While he does produce some BEMANI songs featuring Vocaloids, some of his other songs are completely original works with no Vocaloids, sometimes instrumental works (such as the majority of his Diverse System works), most notably "For UltraPlayers", which was used for the final round of the Sound Voltex tournament at Konami Arcade Championship 2013 and is one of the hardest songs in the entire game.


The Disappearance series includes:

The Fantastic Garden series includes:

  • The Girl's Fantastic Garden
  • Miku, Piano, and Fantasy
  • Magical Girl Radical Paint
  • Anti-The Fantastic Garden
  • Miyako Wasure
  • Capsule
  • At the Old Capital of Atriesta

The Star Girl and the Illusion Paradise series includes:

Other songs, remixes and covers:

Tropes utilized in cosMo's songs:

  • A God Am I: Miku in "Disappearance".
  • Alternate Character Reading: "Anti The Fantastic Garden" is spelled with the kanji for "The Girl's Fantastic Garden" in reverse. Often abused in Disappearance songs' lyrics.
  • Anti-Villain: Dr. Realist, Type IV, in his own song, as he simply aims to free the inhabitants of the Illusionary Theater from Fantasy to Reality. The results are ... one trip short into disaster.
  • Anti-Escapism Aesop: The Star Girl and Fantastic Garden series have heavy themes against escapism, as most of the girls that come into contact with the Garden are escaping something or other from their real lives, and when they remember what that was they all fall into despair. The only person who enters the Garden and doesn't do this is Radio Girl, but she's also the only girl to end her song happier than when she started out.
  • Anachronic Order: On the Disappearance CD, "Zero" is track 8, and is presented as Miku remembering her own first startup.
  • Arc Symbol: The infinity symbol pops up a lot in both the Disappearance series (where it's most seen) and in the Star Girl/Fantastic Garden series.
  • Ax-Crazy: The resurrected virus-infected Miku in "Hyper∞lation".
  • Bittersweet Ending: The end of the "Star Girl" series. Stella finally returns to the form of Lambda and reunites with Rho, finishing their quest to liberate everyone stuck in her illusions. However, all of the girls from the previous songs are still dead.
  • BSoD Song: You could say that this is a specialty of his...
  • Body Horror: The creation of Append is described as some unholy mix of rape and vivisection.
    • The PV artwork for the Cinematic Edit of Disappearance, which features a lovely shot of Miku's severed robotic arm.
    • Not to mention the album artwork for "Hyper∞LATiON", which shows Miku's body full of holes.
  • Bokukko: Miku. The Disappearance series explains that this is the pronoun of choice for all Vocaloids because "boku" is a homonym for the abbreviation VOC. in Japanese.
  • Butt-Monkey: Len has it rough in ''Magical Nuko Len Len" and his "Bousou" parody. His producer is a pervert, he keeps getting stuck in lewd and embarrassing clothing, and when he gets to sing it's either about said embarrassment or being forced to sing lewd things.
  • Call-Back: If you listen closely after the first chorus of "Adventurous Girl", you can hear the melody from "Demise of Hatsune Miku". Considering what happens to Miku in "Demise", this is foreshadowing Adventurous Girl's death from her illness.
  • Came Back Wrong: Miku in "Hyper∞lation" isn't quite the same anymore...
  • Canon Welding: In one of the bad endings Miku imagines to "Disappearance", she winds up in the Fantastic Garden. The writer in Fantastic Garden, who originally had a cameo in "Runaway Boy", turns out to be another real resident of Stella. Stella herself was the singer of a one-shot song, but then popped up again in the Star Girl series as one of the masterminds behind it.
  • Chekhov's Gunman: The protagonist of "The Reincarnated Girl and the Reincarnated Boy" shows up again in "The A.I. Girl and her Deep-Sea Heart", where she is not only revealed to be the same person as Rho, but also ends up liberating Stella and everyone who was stuck in her town, succeeding where Dr. Realist always failed.
  • Concept Album: Most of his albums are these, serving as compilations of his story-based songs.
  • Creator Cameo: cosMo himself voices Gonbuto in "Magical Nuko Len Len".
  • Creator Thumbprint: His thumbprint is making Vocaloids sing VERY fast, and in his more recent songs, bunnies.
    • He's also known for the reoccurring theme of him deconstructing the concept of Vocaloid characters in themselves.
  • Darker and Edgier: The Cinematic Version of "The Disappearance of Hatsune Miku" created for Taiko no Tatsujin is much darker than its original version, taking a more horror-themed interpretation of Miku's deletion.
  • Death by Cameo: "Runaway Boy and the Lost Girl" features short cameos by the Fantastic Garden writer, Rin and Len from "Atriesta", the girl from "R-18", and Lucy (A.K.A Shii-tan, the little girl from "Capsule"). Lucy is sitting on top of a skyscraper. She's so enamored by her drug-induced hallucinations that she falls off.
  • Downer Ending: Doesn't the last few seconds of Adventurous Girl and the Miniature Garden Game" sound familiar? That's right. It's her own electro-cardiogram. "The AI Girl and Her Deep-Sea Heart" confirms her death, as Miku sings about not being able to think while dying while an image of the character lying still in the hospital gown she wore at the end of "Adventurous Girl's" PV appears on screen.
  • Driven to Suicide: The end of a number of Star Girl songs.
  • Earn Your Happy Ending: In spite of everything up to that point, Miku finally gets hers in "The Intense Singing of Hatsune Miku" and "Infinity" endings of the Disappearance series, finally coming to accept her fate as a Vocaloid.
  • Final Boss:
    • The Hatsune Miku: Project DIVA games love setting cosMo songs as these. The first game kicked it off with The Disappearance of Hatsune Miku as its Final Boss. Then its sister song The Intense Voice of Hatsune Miku ejected Disappearance from its position in the second game and its Updated Re-release (and this version of the song remains one of the hardest songs in the series). F threw in the original song Sadistic.Music∞Factory as its Final Boss. F 2nd finally broke the trend by nerfing Intense Voice and setting the Final Boss to 2D Dream Fever. X then brings this back in full force with The Ultimate Medley, which is not only remixed by him, but is a literal Boss Rush of the most dreaded songs in the franchise, which include all of the aforementioned tracks.
    • For UltraPlayers was one of the final round songs in the Sound Voltex II section of Konami Arcade Championship 2013. Furthermore, while the series' difficulty to that point peaked at level 15, it was one of the first two songs to have a chart rated a 16. note 
    • And then yet again in Project SEKAI, with Disappearance and Intense Voice taking up the spots as the hardest songs in the game at all difficulty settings.
  • The Gadfly: The protagonist of R.I.P. in the Gossip Sea is enamored by gossip, believing it to be more addictive than music.
  • Gayngst: Reincarnated Girl is in love with her best friend, but she knows a relationship between them can never happen because both of them are girls, and one of them is heterosexual. Her Garden involves "resolving" this issue by Gender Flipping her, but she slowly realizes that her real self would never get the attention she's getting in this fake world.
  • Hardcore Techno: His music has gradually shifted from fast-paced denpa to proper hardcore and speedcore in recent years, with "Yaminabe!!!!" and "Machinegun Poem Doll" in particular breaching 300 BPM and higher.
  • Ironic Echo: In "Disappearance", Miku says the name "VOCALOID" as she describes her empty existence as one, seeing herself as only being only a "toy" used for singing. In "Infinity", Miku says "VOCALOID" again, this time in reference to her more positive discovery of the meaning of her existence as a medium for others to express themselves with.
  • I Want My Beloved to Be Happy: Reincarnated Girl/Boy does this for Lost Girl, when she realizes that whatever relationship she has in the Garden is only her escapism.
  • Laughing Mad: Miku in her horribly ressurrected form in "Hyper∔Lation". Len also has a stint of laughing crazily while on his stress-induced road roller rampage in "Kagamine Len no Bousou".
  • Last Note Nightmare: "Demise" and "Runaway Boy and the Lost Girl".
  • Lucky Charms Title: "Hyper∞lation", "Capsule" (which is spelled officially as the Greek letter theta), and "Sadistic.Music∞Factory".
  • Mind Screw: Fans are already whacking their brains out which came first: Radio Girl and the Fantastic Garden, or the Fantastic Garden series. Or that either are just very coincidentally the same. Or that it's a result of cosMo simply wanting to screw with us.
  • Mission Control: Luka in "Rainbow Adventure NTG Remake".
  • Motor Mouth: Possibly the most famous implementation of it in all of Vocaloid music, with some of his most famous songs featuring singing so impossibly fast that humans were never meant to replicate in real life. Amusingly, they aren't the fastest rap-style segments ever performed, and real people have successfully covered his songs.
  • Multiple Endings: The Disappearance series has a few:
    • "Demise" is the Worst End, in which Miku is abandoned by her master in the forest.
    • "Disappearance" is the Dead End, in which Miku is deleted. "Hyper∞lation" serves as this end's sequel, but things manage to get worse for her as she is horribly resurrected.
    • "∞" is the True End, and "Intense Song" is the INFiNITY Happy End—both songs involve Miku finally accepting her fate as a Vocaloid.
  • Nintendo Hard: Almost every song he makes that makes it into a rhythm game is explicitly designed to make players suffer as much as possible. "Machine Gun Poem Doll" for Project SEKAI even came with a message from him taunting the players. He then does it again for his winning entry for the Proseka ULTIMATE contest, "Yaminabe!!!!".
  • Refuge in Audacity: Capsule is about an entire kingdom that's falling into ruin because all the adults spend their days in a drugged haze, from the perspective of a little girl who only manages to find happiness by joining them in the pill-popping action. There aren't many media where you can get away with stories like this, let alone have them become popular.
  • Shout-Out: The official art for Sadistic.Music∞Factory has Miku's eyes replaced by Project DIVA note markers.
  • Spiritual Successor/Spiritual Antithesis: "Hatsune Creation Myth" can be seen as one to "Intense Singing" (in the former case) and "Disappearance" (in the latter), particularly in how Miku sings about all the things Vocaloids have done to help people since her inception - thus nullifying the threat of "disappearance" she was faced with from the original song. It helps that the meter for the Motor Mouth section in "Creation Myth" is the exact same as the ones in "Disappearance".
  • Surprisingly Realistic Outcome : "The Real Disappearance of Hatsune Miku" rather bluntly describes how Hatsune Miku would die in real life: she would lose her charm and be forgotten, and the world will move on to the next fun thing, much as it had done in the past.
  • Take That!:
    • "Dr. Realist", meet Radio Girl. It's implied at the end of the song that her attitude towards Dr. Realist is a bad thing, however, since he's really trying to help the residents of the Fantastic Garden (in his own weird way) and she wholesale rejected him. He's more annoyed than anything after the ordeal.
    • "Real Disappearance" is this towards Vocaloid fans who only care about the Vocaloid singing the music they listen to, not the producer behind it.
  • Take That Me: Both Miku and Len's Bousou songs have them addressing cosMo as something of a pervert with delusions of grandeur (Len even asks straight-out if he thought he was buying an eroge when he bought them!). The lines of nonsense kanji that Miku screams in "Hyper∞lation" could also be lampooning how little sense all those high-speed lyrics tend to make.
  • Tsundere: Rin. Also the girl in "I Can't (Mar)Read the Situation" and "Asymmetry".
  • Villain Song: Dr. Realist
  • Villainous Breakdown: Towards the end of Sadistic.Music∞Factory. The rhythm also has a breakdown to go with it.