is a song by Japanese duo Yoasobi from their third EP, The Book 3 (2023). It was released as a single by Sony Music Entertainment Japan on September 29, 2023, serving as the first opening theme for the 2023 Japanese anime series Frieren: Beyond Journey's End.
Written by Ayase and based on the short story Fanfare for Frieren written by Jirà  Kiso, the song expresses the protagonist Frieren's emotions and memories towards the hero Himmel. Commercially, "Yà «sha" peaked at number two on the Billboard Japan Hot 100, and number three on the Oricon Combined Singles Chart, and was certified double platinum for streaming by the Recording Industry Association of Japan (RIAJ).
In September 2022, an anime adaptation of manga series by and , ', was first announced. One year later, on September 1, 2023, the anime released the third trailer, teasing its first opening and ending themes, "Yà «sha" by Yoasobi and "Anytime Anywhere" by Milet, respectively. On the same day, the duo also announced their third EP The Book 3, set to be released on October 4, which "Yà «sha" appears as the first track.
Before the release of "Yà «sha", Yoasobi, alongside Milet, appeared via a screen at the completed screening event of Frieren: Beyond Journey's End on September 23, talking about the themes. On September 27, the duo announced that the song would be released as a single to digital music and streaming platforms the next two days, the same day as the two-hour first four episodes premiere. The buried treasure-styled limited CD single was released on December 13, including the English version, "The Brave", translated by Konnie Aoki, which was released ahead of on November 24, and appeared on the duo's third English-language EP E-Side 3, released on April 12, 2024.
A source for "Yà «sha" is the short story , written by Jirà  Kiso and supervised by the manga writer Yamada. It tells about protagonist Frieren visiting a small town called "Music City" five years after the death of the hero Himmel. She receives a difficult request from an old woman whom she meets in a place filled with music.
Despite funky and upbeat sounds, "Yà «sha" incorporates the main character Frieren's emotional changes and memories towards the hero Himmel, expressing the anime's lonely and melancholy atmosphere. Originally, the opening theme would focus on the worldview of Frieren's journey, but Ayase and Shuya Yamamoto, the duo's creative director, were not satisfied due to the song's "little too much emphasis on the atmosphere". So, Ayase decided to rework the song though he submitted the song to the anime team.
Rockin'On Japans Mie Sugiura praised "Yà «sha" for the structure expressing the story of Frieren: Beyond Journey's End itself densely and interpreted to have a connection with Yoasobi's 2022 single "Shukufuku", an opening theme for ', highlighting the "meaning of life" and "the miracle that we have met". Writing for ', Eriko Ishii admired the lyrics that look like the words popping out one after another from the anime's story and oriental-styled phrase. She also praised Ikura's vocals, which "keeps running to the next melody without leaving any trace, and conveys a tremendous sense of speed, independent of the actual tempo." The Nerd Stash ranked the song as the sixth-best anime opening song in 2023.
With three days of tracking, "Yà «sha" debuted at number nine on the Billboard Japan Hot 100 for the issue dated October 4, 2023, with 22,086 digital sales, 2,426,245 streams, and 5.2 million video views. In its full-tracking second week, the song ascended the peak at number two, behind only Ado's "Show". The song's digital sales slightly decreased to 21,267 units, while the audio streams and video views were increased to 8,139,175 and 9 million, respectively. The song also peaked at number one on the component Download Songs for two consecutive weeks, and number four on the Streaming Songs. Additionally, the song landed at number four on the Hot Animation and ascended to number one the next week.
For Oricon charts, "Yà «sha" entered the Digital Singles (Single Track) Chart at number one for the issue dated October 9, 2023, with 25,958 downloads, becoming Yoasobi's thirteen chart-topper, the second most behind only Kenshi Yonezu (14); and topped the chart for three-consecutive weeks. The song also peaked at number four on the Streaming, number three on the Combined Singles, and number seven on the physical Singles Charts. As of October 2024, "Yà «sha" received double platinum certification from the Recording Industry Association of Japan (RIAJ), surpassing 200 million on-demand streams in Japan.
An accompanying music video for "Yà «sha" premiered on September 29, 2023, at 23:00 JST, shortly after the first four episodes of Frieren: Beyond Journey's End premiere. It was directed by Keiichirà  Saità Â, and produced by Madhouse studio, who both worked on the anime. The visual depicts an adventure of the heroic group consisting of Frieren, hero Himmel, warrior Eisen, and priest Heiter with the same visuals as the anime. As of February 2025, it reached 200 million views. The music video of the English version was uploaded on November 24.
To promote "Yà «sha" alongside the anime, Yoasobi gave interviews at news programs ', and ', as well as the November edition of ', and the 2024 second issue of Weekly Shà Ânen Sunday magazines. The duo gave the debut performance of "Yà «sha" at music festival Nex_Fest on November 3, 2023. The song was added to the setlist for the opening act at British rock band Coldplay's Music of the Spheres World Tour in Tokyo, and the duo's 2023âÂÂ2024 first Asia Tour, Pop Out Zepp Tour, and Coachella, etc. The duo performed "Yà «sha" on television for the first time at the special two-hour debut episode of '. "Yà «sha" was added to the video game Fortnite Festival in December 2024.