[Challenge] A compilation of Vocaloid songs that are difficult to sing
One of the appeals of Vocaloid is that it sings exactly as the creator intends.
Because of that, there are tons of songs built with innovative vocal work—like high tones and ultra-fast melodies that are hard to reproduce with human vocal cords!
This time, we’re introducing Vocaloid songs that are difficult to sing!
It’s recommended for those who want to challenge their limits or acquire new forms of expression.
It might be surprising, but slow ballads also make an appearance.
Be sure to check it out to the end!
[Challenge] A Compilation of Difficult-to-Sing Vocaloid Songs (1–10)
Non-breath ObligePinocchioP

This song sharply depicts the suffocating nature of modern society.
Created by the multi-creator PinocchioP, it was released in June 2021.
It’s characterized by breathless vocals and a delicate soundscape.
The lyrics explore themes like peer pressure and restrictions on individual freedom, resonating deeply with listeners.
In line with the theme, there are very few moments to breathe, making it quite difficult to sing!
MesmerizerSatsuki

Vocaloid producer Satsuki’s “Mesmerizer” was released in April 2024.
It features a distinctive happy hardcore sound arrangement, with a rushing sonic landscape and relentless melodic lines that are absolutely overwhelming.
In striking contrast to its upbeat mood, the lyrics portray emotions worn down by modern society, and that gap really hits hard.
It’s no exaggeration to call this one of 2024’s biggest hits—why not give it a try?
bugKairiki Bear

A dark, pop, and irresistibly addictive track.
Produced by Kairiki bear, it was released in June 2022.
Featured in the rhythm game “Project SEKAI COLORFUL STAGE! feat.
Hatsune Miku.” The lyrics, which portray the protagonist’s unstable emotions, and the intense beat leave a strong impression.
Just about two days after its release, it surpassed one million views, winning the hearts of many fans.
Can you deliver it with crisp, punchy vocals?
Tondemo Wonderssasakure.UK

The fantastical, refreshing atmosphere feels great to listen to! It’s a track by sasakure.
UK, a Vocaloid producer known for progressive musicality, released in June 2021.
It tightly condenses the pure joy of living in the moment! The more you listen, the happier you’ll get.
With its speedy melody and densely packed lyrics, the difficulty level is on the higher side.
But that’s exactly what makes it such a rewarding challenge, right?
Machinegun Poem DollcosMo@Bousou-P

Because it’s a Vocaloid song, that fast, tongue-twister melody line is super high difficulty! This piece, “Machinegun Poem Doll,” was created by the popular Vocaloid producer cosMo@BousouP, known for songs like “The Disappearance of Hatsune Miku.” Released in 2021, it was written specifically for the mobile game “Project SEKAI COLORFUL STAGE! feat.
Hatsune Miku.” It’s a very aggressive track that keeps hitting you with one development after another.
This is exactly what you’d call “cosMo@BousouP’s music.” You might need to practice singing it one part at a time.
Seikai-chan and Kafu-chan’s Errand CapriccioSouth of South

There’s a way to power through on pure hype, but if you’re aiming for a perfect copy, it’s pretty tough! This piece is by Minami no Minami, a Vocaloid producer known for high-energy gag tracks, released in October 2022.
It won 2nd place in the “VocaColle 2022 Autumn” TOP 100 ranking.
Rather than reading an explanation here, it’s the kind of track that makes you want to say, “Just listen to it first.” Just when you think a rap-like section is coming, a rock-paper-scissors part starts.
.
.
before you know it, you can’t escape Minami no Minami’s world.
Whether you can keep your breath through the chorus might be the key to getting through the whole song.
collapse; fainting spell (colloquial/slang)Iyowa

Kyukurarin unfolds in a world that feels as if it hovers between dreams and reality.
As the song that brought Vocaloid producer Iyowa into the spotlight, it gained popularity primarily on the internet.
With its irregular rhythmic development and a somewhat unsettling melodic progression, the sound comes together as if depicting a wavering love.
While aiming for a cute vocal delivery riding on the soft timbres, it’s tricky to maintain a steady tempo.
The key is to stay calm and not get swept away by the constantly shifting sounds.
Be sure to try singing this dreamy Vocaloid track that expresses a girl’s tender yet honest emotions.