1. Introduction: Who is Sasuke Haraguchi?
Recently, Sasuke Haraguchi has been gaining attention as a Vocaloid producer. Many Vocaloid fans may have heard his songs, but what they might not know is that he started composing music at the age of five and made his professional debut as “SASUKE” at just 15 years old.
Moreover, he is not only a talented musician but also an excellent dancer, having won a dance contest in New York. With his multifaceted skills, he is making a significant impact on the music industry.
In this article, we will explore his musical background, unique style, and his journey as a Vocaloid producer.
2. Debut as SASUKE: Entering the Professional World at 15
A Musical Prodigy from a Young Age
Sasuke Haraguchi began composing music when he was just five years old. He taught himself how to play instruments and experiment with different sounds, showcasing an exceptional musical talent from an early age. By the time he was 15, he had already made his professional debut under the name “SASUKE”.
From then on, he gained recognition for his funky, electro-infused, J-pop inspired sound, catching the attention of many industry professionals.
Notable Songs from His SASUKE Era
• “平成終わるってよ” （It seems the Heisei era is over）(2019)
A dance track released at the moment when Japan’s Heisei era was coming to an end. It expresses both the sadness of saying goodbye to an era and the excitement of stepping into a new one.
• “J-POPは終わらない” (J-POP is not over) (2019)
You can enjoy both the stylish city pop vibe and the upbeat electro groove within a single track. His love for the sound of Japanese pop music from the late 80s to the early 90s is evident in both the lyrics and the composition.
• “また会いましょう” (See you again) (2022)
It’s an undeniably stylish track, but you can also catch glimpses of his unique electronic sound. This song allows you to feel the essence of Sasuke Haraguchi as a Vocaloid producer today.
3. A New Chapter as a Vocaloid Producer
After establishing himself as SASUKE, Sasuke Haraguchi expanded his musical career by becoming a Vocaloid producer.
One of his most unique characteristics as a Vocaloid producer is his use of the UTAU version of Teto Kasane instead of newer technologies like Synthesizer V. This choice gives his music a distinctly retro yet experimental sound, setting him apart from many modern Vocaloid producers.
Notable Vocaloid Songs
• “人マニア”（Human Mania） (2023)
This track marks Sasuke Haraguchi’s first Vocaloid song. It features a unique blend of quirky sounds while remaining catchy and danceable. Impressively, he completed everything—from writing and composing to arranging and even creating the visuals—in just three days.
• “Igaku” (2023)
This track features charming tones and playful, unfinished-looking 3D CG, making it uniquely captivating. It also incorporates the signature “Yu!” sound effect, a hallmark of his music. Furthermore, this song won 1st place in the “VocaColle 2024 Winter” TOP100 competition.
• “前ノハナシ (来都来了) ”（Meno Hanashi） (2025)
As of March 16, 2025, this is Sasuke Haraguchi’s latest release. Written as the theme song for Bilibili’s New Year’s special program, this track features a duet between Hatsune Miku and Teto Kasane. The artistic music video, reminiscent of collage art, is also a highlight worth checking out.
Through his Vocaloid works, Sasuke maintains the funky, electro influences from his SASUKE era while pushing boundaries with unconventional sounds and compositions.
Another key appeal of his music is that his lyrics always leave room for interpretation, allowing listeners to explore deeper meanings in every song.
4. What Makes Sasuke Haraguchi’s Music Special?
Sasuke Haraguchi’s music stands out due to three key elements:
① Experimental Yet Well-Crafted Sound Design
His music often features unusual and highly detailed soundscapes that feel almost otherworldly. He pays meticulous attention to synth selection and effects, creating immersive auditory experiences.
In “Igaku,” for example, he uses glitch noises and electronic distortions rather than traditional instruments, crafting an avant-garde listening experience.
② Complex Chords & Melodies That Are Still Catchy and Danceable
His music incorporates jazz and fusion-inspired chord progressions, making it more complex than mainstream pop songs. However, he has a unique ability to keep it groovy and engaging, ensuring that even non-musicians can enjoy and dance to his tracks.
This might be related to his background as a talented dancer—he once won a dance contest in New York, proving that he understands how music and movement interact.
③ Unique Sound Effects and the Signature “Yu!”
One of the most recognizable traits of his music is the frequent use of the “Yu!” sound effect. This quirky yet catchy sound appears in many of his songs, adding a playful and signature touch.
By using such distinct sound effects, he ensures that listeners can immediately recognize his tracks, making them unforgettable.
5. His Work as a Songwriter and Producer for Other Artists
Besides his solo career, Sasuke Haraguchi is also known for his work as a songwriter and producer for other artists. He has contributed to a variety of songs across different genres.
Notable Songs He Has Written or Produced for Other Artists
• “ウシロジカン（Ushirozikan）/ゆーり” (2025)
This song expresses the feeling of dreading tomorrow and not wanting it to come, all set to a playful and bouncy pop track. The combination of Yuri’s vocals and Sasuke Haraguchi’s compositions is always addictive, making their collaborations a must-listen.
• “ポップコーン!![feat. ハローキティ, なるみや, 原口沙輔]（Pop corn‼︎） / MAISONdes” (2024)
Since 2021, MAISONdes has been releasing collaborative works under the concept of a “somewhere apartment”, where various artists and creators come together. This particular song is a special collaboration with none other than Hello Kitty.
His work is widely recognized for blending unique musical elements while adapting to different artists’ styles, showcasing his versatility as a producer.
6. Conclusion: Why Is Sasuke Haraguchi So Unique?
Sasuke Haraguchi is not just another music producer—he is a genius who started composing at five, debuted professionally at 15, won a dance contest in New York, and is now making waves in the Vocaloid scene.
His music stands out for three reasons:
✔ Avant-garde and intricate sound design
✔ Complex yet catchy compositions that make people want to dance
✔ Signature sound effects and the use of UTAU Teto Kasane
With his boundary-pushing creativity and relentless passion for music, there is no doubt that Sasuke Haraguchi will continue to redefine the landscape of music.
Make sure to follow his work—his next masterpiece might just change the way we experience music!
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