Part of KAMITSUBAKI STUDIO, KAF (pronounced Kafu) debuted October 18, 2018, at the age of 14. She is a musically oriented VTuber (VSinger), releasing songs covers and original songs and albums.

On 11 September 2019, KAF released her first full-length album 観測.

On 10 October 2020, it was announced she’d collaborated with CeVIO AI, a vocal synthesizer. Her voicebank, KAFU, will be released in the winter of 2020-2021.

She is like any seventeen-year-old girl living anywhere in Japan, and she could be anywhere but is found nowhere. She is a next-generation virtual singer with a rare singing voice discovered through a series of accidents. In October 2018, as a virtual artist / virtual Instagrammer, she began full-scale activities in the real world, based in the virtual world. Her singing voice and a virtual fusion of music videos and photographs uploaded on social media got attention and followers rapidly increased.

— Via YouTube