1997年、ASA-CHANGソロユニットとして始動。そのトライバルかつアブストラクトな独自の波動に満ちた音楽が国内外で評価されると共に、世界各国のメディアにも取り上げられる。
また、ミュージックビデオにおけるコンテンポラリーダンサーとの共演が世界的な話題となり、09年に音楽×ダンス公演『JUNRAY DANCE CHANG』を世田谷パブリックシアターにて開催。
12年に後関好宏、須原杏をメンバーに迎え、国際的な舞台芸術祭「KYOTO EXPERIMENT 2012」への参加、アニメ『惡の華』のEDテーマ曲の提供など、既存の音楽の枠に捕らわれない活動を展開している。
また、14年9月からライブシリーズ「アウフヘーベン！」を始動、世界的な舞踏家・室伏鴻や映像作家・勅使河原一雅、漫画家・押見修造といったジャンルを横断した作家とのコラボレーションを行い、さらにその活動を進化・深化させている。

ASA-CHANG commenced activities as a solo unit in 1997. Tabla wizard U-zhaan joined in 2000, and the group began staging live performances with Junray Tronics. Its music is imbued with a distinctive vibe produced by the combination of tribal and abstract sounds.

Beginning in 2000, the group appeared at Fuji Rock for five consecutive years, a feat unmatched by any other acts.

After its 2001 release in Japan, “Hana,” its second album, was also released in the United Kingdom under the Leaf label, and was selected as the fourth best album of 2002 by the British magazine The Wire and best album of the same year by Mojo Magazine and Muzik. Besides these accolades in Europe, the group and “Hana” received extensive coverage in the music media of Australia, the United States, Chile, and other countries around the world. A collaboration with contemporary dancers in a music video created a buzz worldwide, and was followed in 2009 by the staging of “Aoiro Theater” featuring their music with dance at Setagaya Public Theatre. A production that could only have been created by a musician (and ex-makeup artist), the work garnered high ratings for its free conception untrammeled by the conventional framework of stage arts. In 2010, Asa-Chang made a fresh start as a solo unit and began to be handled by precog. It has since remained active in creative forms that go beyond established ideas of music.

In 2012, it unveiled the opus “NEW Aoiro Theater” at Kyoto Experiment 2012 with the addition of Yoshihiro Goseki and Anzu Suhara as members.

1978年にパンクバンドAunt Sallyで活動をスター ト。 バンド解散後はソロとして国内外の数々のミュージシャンとコラボレーションを行なう。 現在は、 2013年から始めた電子音楽のソロユニットとパンクバンドMOSTを中心に活動している。 2018年2月に 声のみで制作されたアルバム『Voice Hardcore』を リリース、9月にはThe Raincoatsの アナ・ダ・シルバ とのコラボレーションアルバム『Island』を発売。
2020年9月4日に英・Disciplesよりアルバム『Vertigo KO』をリリース。

Phew is a legendary figure in Japanese underground music. Starting out in 1978 fronting one of Osaka's earliest punk groups, Aunt Sally, and going on to collaborate with a whole host of notable names as a solo artist in the 80s, including Ryuichi Sakamoto, Conny Plank, Holger Czukay and Jaki Liebezeit of Can, Alex Hacke of Einstürzende Neubauten, and Chrislo Haas of DAF. In recent years she's made music on record or live with Ana da Silva of The Raincoats, Jim O'Rourke, Oren Ambarchi, Ikue Mori, and Yoshimi of OOIOO / Boredoms / Saicobab. For Disciples however, the most interesting aspect of Phew's work is the fact she has made her strongest musical work in the last few years, working entirely on her own. There's a lot of interest from crate-digger type labels in her early 80s new wave oriented work, and the names she's worked with are impressive, but there's no doubt in our minds that her two most recent records, Light Sleep and Voice Hardcore, are modern classics. It’s this period of her work that we were keen to explore with these releases, a contemporary archive of incredible and unique music.