TXT's "Setsuna Hanabi" Finds Unexpected Success But Its Genre-Blending Formula Isn't New

TOMORROW X TOGETHER's latest Japanese release sounds noticeably different from much of the group's discography. However, at the same time it sounds exactly and unmistakably like something they would release.

"Setsuna Hanabi," which was released digitally on Aug. 17 as the title track of TXT's fifth Japanese single, has achieved significant results despite not being a Korean comeback. The track became the group's first-ever No. 1 on the Billboard Japan Hot 100 as well as their first No. 1 on Oricon's Weekly Digital Singles chart, giving TXT two new career milestones in the Japanese market.

The response to the track has also extended beyond the Japanese market. Across online K-POP communities, "Setsuna Hanabi" has generated discussion among both TXT's fandom, MOA, and listeners outside it, with much of the conversation centered on the track's sound.

The reason may lie in a formula TXT has been developing for years: making an unfamiliar sound feel distinctly like them.

At its core, "Setsuna Hanabi" is described as a Brazilian funk track, with that influence clearest in its fast-moving rhythm and syncopated percussion. However, describing the track simply as Brazilian funk only tells part of the story.

The production also pulls from sounds associated with several other genres. Distorted electronic textures running underneath the track, for example, resemble characteristics increasingly associated with Brazilian phonk. Rather than allowing those harsher elements to dominate the song, however, "Setsuna Hanabi" keeps them contained within a broader K-POP structure.

Elsewhere, a sharp guitar lead adds another layer to the production, while other elements resemble sounds commonly used across EDM, trap and hip-hop. Rather than blending these influences until their individual characteristics disappear, "Setsuna Hanabi" gives each of them a distinct role.

Brazilian funk largely drives the percussion, while rock comes through the guitar and electronic dance music shapes much of the synth pattern. Above those individual elements, however, sits perhaps the most important part of the track: the melodic style that has long characterized TXT's music.

As the track moves through these different influences, TXT's vocal melody remains strikingly sentimental. The members stretch out emotive melodies that reinforce feelings of yearning and helplessness, emotions that have repeatedly appeared throughout the group's music. As a result, while "Setsuna Hanabi" represents a new musical direction, its emotional core remains distinctly TXT.

"Setsuna Hanabi" is also far from the first time TXT has built a song around seemingly contrasting genres. Their 2024 title track "Deja Vu," for example, combined rage, a subgenre of trap, with emo rock. On paper, the aggressive electronic characteristics of rage and the emotionally charged, guitar-driven nature of emo rock belong to noticeably different musical worlds. Within "Deja Vu," however, the two were tied together through the group's familiar emotional delivery.

The same pattern can also be found throughout TXT's B-sides. Their 2023 mini-album "The Name Chapter: TEMPTATION," for example, explored the approach through both title track "Sugar Rush Ride" and B-side "Tinnitus (Wanna Be a Rock)." The latter incorporated Afrobeats into TXT's music at a time when the sound was still comparatively less common within mainstream K-POP.

"Sugar Rush Ride," meanwhile, was built as an alternative pop dance track, incorporating funky guitar alongside sudden shifts in energy. That musical contrast reflected the temptation at the center of the song, while "Tinnitus (Wanna Be a Rock)" used its rhythmic foundation to express the insecurity and uncertainty surrounding youth that had long characterized TXT's music.

The repetition of this pattern over time suggests that TXT's musical identity has never depended on one particular genre. Rather, one of the group's most recognizable formulas has been pairing an unfamiliar sound with a familiar emotion.

From pop-rock and emo rock to Afrobeats, trap and now Brazilian funk, the genres surrounding TXT have continued to change. What remains is the emotional center underneath them: uncertainty, growing up, longing, separation and the desire to hold onto something even while knowing it cannot last forever.

"Setsuna Hanabi" follows the same formula through its story of a fleeting summer relationship, comparing the inevitability of separation to fireworks disappearing from the night sky. Rather than pairing that story with an equally soft or melancholic instrumental, however, the track does almost the opposite, using its energetic mix of genres to create a contradiction at the center of the song.

That contrast of something feeling exhilarating while it is happening and painful precisely because it cannot last, is what separates "Setsuna Hanabi" from simply being TXT's attempt at Brazilian funk or Brazilian phonk. Rather than reproducing either sound outright, the track places recognizable elements from them inside a melodic and emotional structure that already belongs to TXT.

The response has also raised another question among fans: why should this particular side of TXT remain limited to a Japanese release when similar experimentation has already appeared throughout the group's Korean discography?

Some fans have consequently called for a Korean version of "Setsuna Hanabi," hoping the group will eventually perform the track more widely outside Japan. Others have pointed to its reception both within and beyond Japan as a sign that the song's more experimental production could also translate to TXT's Korean and international releases.

That does not necessarily mean "Setsuna Hanabi" itself needed to be a Korean single. TXT has maintained a substantial Japanese discography throughout their seven-year career, and those releases serve a different market and purpose from the group's Korean albums. Its popularity does, however, raise a broader possibility.

If a Japanese original built around one of TXT's more unconventional combinations of genres can generate this level of response within the wider K-POP community, its success may offer an indication of what listeners are currently responding to from the group.

Seven years into their career, one track does not mean TXT needs to find an entirely new musical identity. If anything, "Setsuna Hanabi" suggests that their next steps may benefit from continuing to stretch the identity they already have. Brazilian funk may be new territory, but underneath it remains the same emotional language that has made the group recognizable across genres.