She is best known as the vocalist of the duo Yoasobi with producer Ayase, under the stage name Ikura, and a former member of the cover group Plusonica [ja].

[12][13][14] In 2015, Ikuta participated in several casting and auditions, including Singin'Japan hosted by Sony Music Entertainment Japan where was selected as a finalist.

[25] Ikuta re-released "Romance no Yakusoku", originally from her EP Jukebox, on August 14, accompanied love reality series Kyō, Suki ni Narimashita: Himawari-hen [ja].

[27] Additionally in 2021, Ikuta featured on Fujifabric's "Tarinai Sukunai" from their eleventh studio album I Love You [ja],[28] Tomorrow X Together's Japanese version of "0X1=Lovesong (I Know I Love You)" from the group's first Japanese EP Chaotic Wonderland,[29] and Rei's "Hōseki",[30] and collaborated with Milet and Aimer for The First Take's "Omokage" to advertise Sony's wireless noise-canceling earphones WF-1000XM4.

[36] In January 2023, Ikuta released "Tanpopo" for NHK's Drama 10 Ōoku,[37] preceded her debut studio album Sketch, which was issued on March 8.

[40] Ikuta features on Chiaki Satō's single "Senkō Hanabi" from her third studio album Butterfly Effect, released on June 14.

[49] Ikuta released "Humming" on June 1,[50] which was used as a theme for morning show Mezamashi Saturday, starting on April 6.

[53] Ikuta performed themes "Stay with Me" for an anime adaptation of fictional character Rilakkuma by Production I.G,[54] "Shinsekai yori" with Ano for the anime series version of Dead Dead Demon's Dededede Destruction,[55] "Hyakkaryōran" for the second season of The Apothecary Diaries,[56] and the English and Japanese versions of "Nameless Faces" for video game Honkai: Star Rail.

[57] Vocaloid record producer and musician Ayase, who was asked to form a music project as part of a collaboration with the creative writing social media Monogatary.com, reached out to Ikuta after seeing a video on Instagram and asked her if she was willing to start a music project with him, becoming the start of the duo Yoasobi.