The era when the score itself takes the spotlight

Not the theme song. Not an insert track. A pure piece of background score—an instrumental meant to play beneath the picture—climbed to No.1 on an overseas chart. It really happened. The track is “Outlaws Get No Entry,” composed by Taku Iwasaki for GACHITRACKS, the original soundtrack of the TV anime Gachiakuta.

On Billboard JAPAN’s country/region “Japan Songs” chart, the piece topped the rankings in both South Africa and the United States for the survey week of January 16–22, 2026. There is no singing, no rap—just voice samples and percussion driving the whole thing. A composer’s name standing alone at the summit, like a vocalist’s, is a quiet but unmistakable sign that the very nature of scoring work is shifting.

African groove inside a “raider’s” theme

Based on Kei Urana’s manga, Gachiakuta is a dark fantasy that aired across two consecutive cours from July 2025. It follows a boy discarded as garbage into an abyss who claws his way back up armed with supernatural tools called “Vital Instruments.” Iwasaki wrote a hefty 59-track score for this world. True to a composer who has freely crossed hip-hop, rock and orchestra, GACHITRACKS steps over genre walls within a single album.

What propels “Outlaws Get No Entry” is undulating African percussion and an incantatory chant. That texture—earthy yet futuristic—got listeners abroad moving. The spark was dance clips on social media: posts of people moving to the beat chained together on TikTok and beyond, pulling in even viewers who had never seen the anime. The score had begun to walk on its own, outside the show.

  • Work: TV anime Gachiakuta (manga by Kei Urana; premiered July 2025, second cour from October 12)
  • Music: Taku Iwasaki, GACHITRACKS – Gachiakuta Original Soundtrack (59 tracks)
  • Feat: “Outlaws Get No Entry” hit No.1 in South Africa and the U.S. on Billboard JAPAN’s Japan Songs (week of Jan 16–22, 2026)

Why an instrumental struck a chord worldwide

Recent overseas anime-music hits have belonged to the likes of YOASOBI and Kenshi Yonezu, or to opening theme songs. For a score itself to break in is no small thing. An instrumental carries no barrier of language or lyrics; it needs no translation. Its strength—crossing borders on beat and timbre alone—dovetailed perfectly with the age of short-form video. Because Iwasaki had absorbed the vocabulary of African music, he ended up opening a door far beyond the Japanese-speaking world.

The phenomenon was more than a fleeting chart figure. “Outlaws Get No Entry” also earned a nomination at MUSIC AWARDS JAPAN 2026, drawing attention on both domestic and international measures of merit. With a second season of Gachiakuta already confirmed, the day Iwasaki’s score once again fills speakers around the world is not far off.

The next horizon for the craft of scoring

A composer standing atop the charts on the strength of his own sound alone, without borrowing a vocalist’s name—that is an honor that has rarely come to a screen composer. Into a scoring world that long prized being the invisible servant of the image, streaming and social media have opened a new circuit. A track runs on its own away from its work, and listeners hunt for sound by the composer’s name. The Gachiakuta case will be remembered as a symbolic step in that direction.

Music born from the story of a boy thrown out as trash now makes people dance on the other side of the planet. It’s deliciously ironic—and somehow exhilarating. The border-crossing instinct that veteran Iwasaki has honed over a quarter century is bearing fruit in its most contemporary form yet. Scoring is no longer music that lives only behind the picture.