Jeremy Quartus—the solo project of JQ, vocalist and producer of the band Nulbarich—has launched an ambitious two-part collaboration that pairs him with two of Japan's most distinctive musical voices. On September 23, 2026, he released "Pops," fully produced by n-buna of Yorushika, and he's set to follow it with "Bokura no Koto ni Sasete" ("Let It Be Our Business"), produced entirely by Vaundy, on November 4, 2026. For fans curious about what these collaborations actually entail, how they came together, and where to find them, we've gathered everything confirmed so far.
The Quick Version
- Jeremy Quartus released "Pops (Prod. n-buna from YORUSHIKA)" as a digital single on September 23, 2026.
- A second single, "Bokura no Koto ni Sasete (Prod. Vaundy)", is scheduled for release on November 4, 2026.
- Both tracks are fully produced by their respective collaborators—n-buna handled all production elements for "Pops," and Vaundy is doing the same for the November release.
- The project was announced on September 14, 2026, and positions JQ's voice and artistry through two contrasting creative lenses.
- Both singles are available via digital streaming and download platforms.
What "Fully Produced" Means in These Collaborations
When we hear that a song is "fully produced" by someone, it's natural to wonder what that actually covers. In the case of Jeremy Quartus's two new singles, the term signals that n-buna and Vaundy each took comprehensive creative control over their respective tracks—handling arrangement, sound direction, and overall production rather than simply contributing a verse or remix.
For "Pops," n-buna—the composer and producer behind Yorushika—was responsible for shaping the entire sonic identity of the track. Yorushika's official social media account confirmed on September 14, 2026, that n-buna had fully produced Jeremy Quartus's new song, underscoring the depth of his involvement. This isn't a guest feature; it's n-buna's vision applied to JQ's voice and artistry.
Similarly, Vaundy is taking the production reins for "Bokura no Koto ni Sasete," the second single due on November 4, 2026. While the precise division of labor—who wrote lyrics versus who composed melodies versus who arranged instruments—hasn't been detailed publicly, the "full produce" credit in Japanese music industry terms typically means the producer is the primary creative architect of the recording. We're looking at two distinct interpretations of Jeremy Quartus, each filtered through the unique sensibility of a major contemporary Japanese pop artist.
The First Single: "Pops" Produced by n-buna
Released on September 23, 2026, "Pops" (ポップス in Japanese) marks the first half of this collaboration series. The title itself is straightforward—"Pops" as in popular music—but that simplicity likely conceals n-buna's knack for layering emotional complexity beneath accessible melodies. Fans of Yorushika know n-buna for crafting songs that balance catchy hooks with introspective, often melancholic storytelling, and his involvement here suggests "Pops" will bring that duality to JQ's vocal style.
The single became available digitally on September 23, 2026, across major streaming platforms and digital music stores. For listeners familiar with Nulbarich's smooth, neo-soul-inflected sound, hearing JQ's voice in a track shaped entirely by n-buna's production aesthetic offers a fresh perspective. It's a rare opportunity to hear how one artist's voice can be recontextualized through another's creative framework—and in this case, we're talking about two of the most recognizable names in contemporary Japanese pop and alternative music.
The Upcoming Second Single: "Bokura no Koto ni Sasete" Produced by Vaundy
The second release, scheduled for November 4, 2026, brings Vaundy into the picture. The title "Bokura no Koto ni Sasete" (僕らの事にさせて) translates roughly to "Let It Be Our Business" or "Make It About Us," hinting at a theme of personal ownership or intimacy. Vaundy, whose music often blends retro pop influences with modern production and a playful, genre-fluid approach, is likely to steer this track in a direction quite different from n-buna's.
Where n-buna's work with Yorushika leans toward narrative-driven, emotionally nuanced rock and pop, Vaundy's catalog is known for its eclectic energy—drawing from funk, city pop, indie rock, and electronic textures. That contrast is exactly what makes this two-single project so intriguing: we're getting two versions of Jeremy Quartus, each filtered through a producer with a distinct sonic personality. The November 4, 2026, release will be digital, matching the format of the first single, and it's expected to appear on the same streaming and download services.
Why This Collaboration Matters
We've seen plenty of artist-to-artist collaborations in Japanese music, but what stands out here is the format. Rather than a traditional duet or a single guest appearance, Jeremy Quartus has handed creative control to two different producers for two separate tracks. It's a bold move that positions JQ not just as a performer, but as a versatile voice capable of inhabiting different musical worlds.
Both n-buna and Vaundy are towering figures in the current Japanese music landscape. Yorushika, with n-buna at the helm, has built a massive following through emotionally charged storytelling and cinematic production. Vaundy, meanwhile, has become one of the most talked-about young artists in Japan, known for his genre-blurring style and visually striking music videos. By partnering with both, Jeremy Quartus is aligning himself with two of the most influential creative voices of the moment—and giving fans a chance to hear his artistry through two very different lenses.
The project also reflects a broader trend in Japanese pop music: a willingness to blur the lines between artist and producer, and to treat individual singles as artistic statements rather than simply promotional tools. We're living in an era where a single can be an event in itself, and this two-part release leverages that dynamic beautifully.
How the Project Came Together
The collaboration was officially announced on September 14, 2026, giving fans just over a week to prepare for the first release. According to official statements and coverage, the concept centers on showcasing "two different sensibilities" and how they each express Jeremy Quartus in their own way. It's a framework that invites comparison not just between the two tracks, but between n-buna's and Vaundy's creative approaches more broadly.
Yorushika's official account shared the news directly, confirming n-buna's full production role and the September 23 release date for "Pops." The announcement emphasized the collaborative spirit of the project, with n-buna expressing his involvement in producing a new song for Jeremy Quartus. Meanwhile, details about the Vaundy-produced track appeared across multiple music news outlets and festival lineups, cementing the November 4 date for "Bokura no Koto ni Sasete."
The timing of the releases—separated by about six weeks—gives each single room to breathe and be appreciated on its own terms before the next arrives. It also builds anticipation: listeners who enjoyed "Pops" will naturally be curious to hear how Vaundy's take differs, and those who connect more with Vaundy's style will have something to look forward to in November.
What People Are Saying
"I wasn't expecting JQ to go this direction, but pairing with n-buna and Vaundy? That's a dream lineup. Can't wait to hear how different the two tracks sound," one fan wrote on social media shortly after the announcement.
Another listener reflected on the first single: "Pops has that n-buna fingerprint all over it—the melody feels nostalgic but fresh at the same time. JQ's voice fits perfectly."
A third fan focused on the upcoming release: "If Vaundy brings even half the energy he had on his recent stuff, the November single is going to be completely different from Pops. That's what makes this project so cool—same artist, two totally different vibes."
Frequently Asked Questions
When did "Pops" come out, and when is the Vaundy track releasing?
"Pops," produced by n-buna, was released on September 23, 2026. The second single, "Bokura no Koto ni Sasete," produced by Vaundy, is scheduled for release on November 4, 2026.
Where can I listen to these songs?
Both singles are being released digitally, which means they're available on major streaming platforms and digital music stores. Specific platform names haven't been confirmed in official statements, but digital releases in Japan typically appear on services like Spotify, Apple Music, and others.
Who is Jeremy Quartus?
Jeremy Quartus is the solo project of JQ, the vocalist and producer of the band Nulbarich. Nulbarich is known for its blend of neo-soul, funk, and J-pop, and JQ's work under the Jeremy Quartus name allows him to explore different creative directions outside the band format.
What does "fully produced" mean in this context?
When we say n-buna and Vaundy "fully produced" their respective tracks, it means they took comprehensive creative control—handling arrangement, sound direction, and overall production. It's more than a feature or a remix; it's their complete vision applied to Jeremy Quartus's artistry.
Will there be more collaborations like this?
As of now, only these two singles have been announced. Whether Jeremy Quartus will continue this format with other producers in the future hasn't been confirmed, but the success and reception of this project could certainly open the door for similar collaborations down the line.
What We're Looking Forward To
With "Pops" already available and "Bokura no Koto ni Sasete" arriving on November 4, 2026, we're in the middle of a fascinating experiment in musical identity. Hearing the same artist interpreted through two such distinct creative lenses gives us insight not just into Jeremy Quartus's versatility, but into what makes n-buna and Vaundy such compelling producers in their own right. Whether you're drawn to n-buna's introspective, melodically rich approach or Vaundy's genre-bending energy, there's something here worth paying attention to. The November release will complete the picture, and we'll finally be able to hear the full scope of what this collaboration set out to achieve.
