Virtual Character Encyclopedia

KAFU

可不

A Musical Isotope built from KAF’s singing voice for creator-made music. [1] [2] [3]

Format
Voicebank singers
Performance
Voice synthesis
Project market
Japan
First release / debut
Unconfirmed
Organization / project
KAMITSUBAKI STUDIO / Musical Isotopes

Biography

KAFU is a Musical Isotopes singing character using KAF’s voice as source material. CeVIO AI lets creators shape lyrics, melody and delivery. The official project distinguishes an isotope from its originating singer, so KAF’s concert career should not be copied into KAFU’s biography.

The singing software launched on July 7, 2021. Its KAF+YOU compilation brought together multiple producers, including syudou with “Cute na Kanojo,” establishing a catalogue that different authors could extend through the voicebank.

[1] [2] [3]

Milestones

  1. CeVIO AI singing software released [2]

Works & performances

Sources

  1. Musical Isotopes — KAFUAccessed 2026-10-20
  2. KAMITSUBAKI — KAFU release and compilation announcementAccessed 2026-10-20
  3. KAF official glossary — Musical IsotopesAccessed 2026-10-20

This account concerns the singing character and its products. A voicebank release is not necessarily the character’s first public appearance. AI denotes singing synthesis, not autonomous authorship or account operation.

Updated 2026-10-20