Yoasobi

• 1. Introduction

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  In April 2024, Yoasobi performed at a White House state dinner. The occasion was a visit by Japanese Prime Minister Fumio Kishida, hosted by US President Joe Biden. The project had once been planned as a trial run of just a few songs. It had traveled a considerable distance.

  Yoasobi consists of songwriter and producer Ayase, and vocalist Ikura. Their name translates from Japanese as "nightlife," a word Ayase chose deliberately. He saw individual careers as daytime work, and Yoasobi as what they did after dark. Every song released under the Yoasobi name must connect to a specific piece of fiction. That rule governs everything from how Ayase composes to how Ikura performs.

  The project launched in 2019 with a single uploaded to YouTube. By 2025, Yoasobi had performed across Asia, North America, and Europe. The story behind all of that starts with a songwriter who learned production in a hospital room. It also involves a teenager who busked with a guitar at fourteen.

• 2. Two Careers Before One

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  Ayase spent years as a vocalist for a Japanese rock band called Davinci, active from 2012 to 2018. During a hospital stay for peptic ulcer disease, he turned to Vocaloid software to produce music. Composing on a computer, without relying on live musicians, became his method.

  His first original song, "Sentensei Assault Girl," was uploaded to the video-sharing website Niconico in 2018. A follow-up called "Last Resort" brought him wider attention the following year. By December 2019, Ayase had released his debut extended play, Ghost City Tokyo, establishing himself as a solo producer and Vocaloid musician.

  Lilas Ikuta, who would later adopt the stage name Ikura for Yoasobi, had a different path. She started performing on streets and in small venues with a guitar at the age of 14. In 2016, she joined a training program called the Lesson, sponsored by Sony Music Entertainment Japan. Through it she released a demo CD titled 15 no Omoi. She then released two EPs independently: Rerise in 2018 and Jukebox in 2019. She was also a member of the cover group Plusonica between 2017 and 2021. Both her career and Ayase's were still running on separate tracks when a creative writing website in Tokyo changed that.

• 3. The Story-First Method

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  In 2019, Yohei Yashiro, founder of the creative writing platform Monogatary.com, proposed an unusual prize for selected story submissions. Rather than a book deal or anime adaptation, a winning author would receive a song. Monogatary.com was owned by Sony Music Entertainment Japan. Yashiro enlisted Shuya Yamamoto, who handled SMEJ's artists, shortly after they first met at a party.

  Yashiro and Yamamoto approached Ayase in the middle of 2019 to produce songs for the project. During the search for a vocalist, Ayase came across a cover of Aimyon's "Kimi wa Rock o Kikanai" on Instagram. The singer was Ikura. He checked her YouTube channel and contacted her directly to propose forming Yoasobi.

  The duo's slogan, "novel into music," comes with a clear enforcement mechanism. If a song is not based on a fictional story, neither Ayase nor Ikura releases it under the Yoasobi name. It goes out separately under their individual names: Ayase uses his own name, and Ikura records as Lilas Ikuta.

  Ayase's production process starts with the source story. He reads it repeatedly before touching an instrument, then writes music that reflects his own feelings and experiences as they connect to the story. He works on Logic Pro using Hatsune Miku as his vocal proxy. This lets him finalize arrangements without adapting them to any particular human voice. Only then does Ikura receive the demo. She writes her first impressions of the lyrics and finds her own method for delivering them before recording. She performs from the point of view of the story's protagonist or narrator, not from herself. Ikura's characteristic "ah" vocable threads through many Yoasobi songs, appearing both as a lyrical element and as a purely musical sound outside the words.

• 4. "Yoru ni Kakeru" and the Streaming Era

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  The duo's first song, "Yoru ni Kakeru," drew from a short story titled Thanatos no Yūwaku, written by Mayo Hoshino. The story had won the Sony Music Award at Monocon 2019, a contest run through Monogatary.com. The song was released to streaming platforms on the 15th of December 2019, distributed independently.

  The timing coincided with the COVID-19 pandemic reaching Japan. As restrictions spread through early 2020, a solo home performance by Ikura titled The Home Take went viral on social media, bringing the song to new audiences. In March, "Yoru ni Kakeru" entered the Billboard Japan Hot 100 at number 76. By May, five months after its streaming release, it reached number one for the first time. It stayed there for a total of six weeks, three of which were consecutive.

  When 2020 ended, "Yoru ni Kakeru" ranked as the year's top song on the Japan Hot 100. No single that had never been released as a physical CD had ever finished first on that year-end chart before. On the 31st of December, the duo appeared at the 71st NHK Kōhaku Uta Gassen. They performed "Yoru ni Kakeru" for the first time live as a duo, filmed at Bookshelf Theater inside the Kadokawa Culture Museum in Tokorozawa. It was the first time any artist had performed at that television special without any physical releases to their name.

  The Recording Industry Association of Japan certified "Yoru ni Kakeru" diamond for reaching 500 million streams in 2021. It reached double diamond, for 1 billion streams, in 2025. Both certifications were the first of their kind in Japanese music history. The song won Song of the Year at the 2020 MTV Video Music Awards Japan. It also won that prize at the 2021 Space Shower Music Awards, and earned the Silver Prize at the 2023 JASRAC Awards.

• 5. Sound and Influence

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  Ayase grew up listening to '80s and '90s music alongside K-pop and folk. His named musical influences include Radwimps, Kobukuro, Maximum the Hormone, Slipknot, and Bring Me the Horizon. Ikura cites Taylor Swift as a major musical influence, alongside Arashi, Ikimonogakari, and Radwimps. The breadth of those reference points shows in the duo's output.

  Critics have described the duo's music as "fast" and "relentless," with complex structures involving shifting rhythms, key changes, and octave jumps. Trade press has categorized it across pop rock, synth-pop, electropop, and electronic rock. Billboard Japan noted that electronic rock has become Yoasobi's current direction, as the duo has placed increasing emphasis on live performance.

  In a September 2024 interview with the Associated Press, Ayase described their relationship to genre in plain terms. "We think that Yoasobi is its own genre," he said. "There's no specific genre they're going after we're going after. We're definitely influenced by J-pop in general." Music critic Tomonori Shiba described Yoasobi as representatives of a "male producer and female vocalist" tradition. He compared their creative process to that of Mr. Children. Writing for Brutus, critic Suzie Suzuki described the music as "a Reiwa-like appearance and a Shōwa-like inner self."

  Yoasobi, along with Yorushika and Zutomayo, belong to a loose grouping defined by shared Vocaloid roots and animated music videos. All three names contain the character "夜," meaning "night" in Japanese. The Asahi Shimbun described Ikura's voice as effortlessly clearing high notes while sailing through rapid-fire lyrics at tempo, with moments of playful rap.

• 6. "Idol" and the Global Record

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  In early 2021, Yoasobi recorded both the opening and ending themes for the second season of the anime series Beastars. Their opening theme, "Kaibutsu," was released on the 6th of January 2021. It reached number two on the Japan Hot 100. The song won four awards at the 36th Japan Gold Disc Award. Time magazine ranked it fifth among the ten best songs of 2021, making Yoasobi the only Japanese act on the list.

  In 2023, they recorded the opening theme for Oshi no Ko, an anime about the idol industry. The song, "Idol," was based on a short story titled 45510, written by the manga's creator Aka Akasaka. It was released on the 12th of April 2023. What followed was a run of chart performance that had no precedent in Japanese music history.

  "Idol" stayed at number one on the Billboard Japan Hot 100 for 22 non-consecutive weeks. The previous record was 13 weeks, held by Official Hige Dandism's "Subtitle." The Recording Industry Association of Japan certified it diamond within 295 days of release, the fastest any song had achieved that milestone. Its music video reached 100 million views within 35 days, the fastest any music video by a Japanese act had done so.

  Outside Japan, "Idol" peaked at number seven on the Billboard Global 200. It topped the Global Excl. US chart, the first Japanese-language song to reach that position. The International Federation of the Phonographic Industry ranked it the 19th best-selling song worldwide in 2023, with 1.01 billion subscription stream equivalents. On the 31st of December 2023, Yoasobi performed "Idol" at the 74th NHK Kōhaku Uta Gassen. They were joined by selected members from idol groups including Seventeen, NewJeans, and Stray Kids.

• 7. Taking J-Pop Global

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  Yoasobi held their first overseas performance in December 2022 at the Head in the Clouds Festival in Indonesia. Less than a year later, in August 2023, they performed at the same festival's US edition, their first show in the Western Hemisphere.

  They supported Coldplay for two Tokyo shows in November 2023 and performed at Coachella and Lollapalooza in 2024. A US concert tour followed that year, and their Japanese dome tour drew 170,000 audiences. In 2025, they performed at Wembley Arena in London and opened the Saitama show of Billie Eilish's Hit Me Hard and Soft: The Tour.

  Spotify reported that Yoasobi was the most-streamed Japanese artist outside Japan for four consecutive years, from 2021 through 2024. They ranked second in 2025. Apple Music placed three of their songs among the 500 most-streamed tracks on the service between 2015 and 2025. According to the online magazine Nippon.com, the duo was the most listened-to Japanese artist since 2023.

  Their international reach extended into South Korea, a market with a historically complicated relationship with Japanese popular culture. Content creator Kim Gye-ran, founder of Tamago Production, cited Yoasobi as one of his inspirations for forming the all-female rock band QWER. In September 2025, the duo collaborated with South Korean girl group Le Sserafim on "The Noise." Released on the 26th of September, the song contained a sample of "Yoru ni Kakeru." Their Never Ending Stories Tour, set for 2026, includes dates at Osheaga and Lollapalooza alongside an Asia and Japan tour running into 2027.