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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 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, 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:

  • Song Box (one version each for Miku, the Kagamines, and Luka)
  • Dennoh Skill
  • Packaged (cover)
  • Meltdown -Hard RK Mix- (cover)
  • Just Be Friends -Hard RK Mix- (cover)
  • R-18
    • R-25 (self-cover)
  • Dokubou Stellar Theater
  • Magical Kitty Len Len
  • Dystopia Jipangu
  • Rainbow Adventure NTG Remake (cover)
  • The Rampage of Kagamine Len (a spoof of "The Rampage of Hatsune Miku")
  • Melt -Soft LM Mix- (cover)
  • Evans VolteX Pf arrange (remix)
  • neu BSP style (remix)
  • Escape from Dystopia
  • Sadistic.Music∞Factory
  • For UltraPlayers
  • Monopole.
  • The Real Disappearance of Hatsune Miku
  • Distorted † Happiness

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.
  • Anachronic Order: On the Disappearance CD, Zero is track 8, and is presented as Miku remembering her own first startup.
  • Ax-Crazy: The resurrected virus!Miku.
  • 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.
  • 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.
  • 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
  • Creator Thumbprint: His thumbprint is making Vocaloids sing VERY fast, and in his more recent songs, bunnies.
  • 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 The Adventurer Girl and the Playground of Eden sound familiar? That's right. It's her own electro-cardiogram.
    • The End... Or Is It?: It could as well be that it was removed, which means she got out of the hospital. But we all know cosMo does not like like Happy Endings like that.
    • Nope. In The AI Girl and Her Deep-Sea Heart, 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 the PV appears on screen. So, it's fairly safe to say she didn't live.
  • Driven to Suicide: The end of a number of Star Girl songs.
  • Earn Your Happy Ending
  • 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.
  • Gayngst: The protagonist of Reincarnated Girl.
  • Ill Girl: Adventurous Girl.
  • I Want My Beloved to Be Happy: "Reincarnated Girl/Boy" towards "Lost Girl".
  • Last Note Nightmare: Demise and Runaway Boy and the Lost Girl.
  • Lucky Charms Title: Hyper∞lation, Capsule, 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
  • Multiple Endings: 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 with Hyper∞lation being its sequel where she is horribly ressurected), is the "True End", and Intense Song is the "INFiNTY Happy End" (both in which Miku finally accepts her fate as a Vocaloid).
  • Reality Ensues: 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.
  • 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.
  • Take That!: Dr. Realist, meet Radio Girl.
  • 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.
  • Villain Song: Dr. Realist
  • Villainous Breakdown: Towards the end of Sadistic.Music∞Factory. The rhythm also has a breakdown to go with it.


Example of: