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SEKAI

A CeVIO AI musical isotope built from ISEKAIJOUCHO's vocal data, inheriting the transparency and narrative quality of the original voice.

SEKAI
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Overview

SEKAI is the second voice synthesis software in KAMITSUBAKI STUDIO’s Musical Isotope series, built from the vocal data of virtual singer ISEKAIJOUCHO. It inherits the transparency and narrative quality characteristic of the original voice.

Joining the series after KAFU, SEKAI further enriches the Musical Isotope product line. Its voice quality tends toward clarity and softness, occupying a differentiated position from KAFU’s more youthful character.

Role and Creative Position

SEKAI’s voice source derives from ISEKAIJOUCHO — the V.W.P member known for “world-system” narrative and emotional expression. As a result, SEKAI is frequently used in the UGC ecosystem for songs that require transparency, lyricism, and narrative depth.

Like KAFU, SEKAI is not merely a tool but is positioned as a “voice character” within the creator community — with its own visual identity and settings, connected to yet independent from the original singer ISEKAIJOUCHO.

Activity History

  • Circa 2022: Released as the second installment in the Musical Isotope series.
  • Became one of the代表性 voice banks on the CeVIO AI platform alongside KAFU.
  • Participated in KAMITSUBAKI FES’24 and FES’25.
  • Widely used by creators in original songs and covers.

SEKAI does not release traditional music作品 but exists as a creative tool. Songs created with SEKAI are continuously produced by the UGC creator community.

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Related Projects / Setting

SEKAI is part of the Musical Isotope Project, initiated by KAMITSUBAKI STUDIO to develop voice synthesis software based on its virtual singers’ vocal data using AI technology. KAFU (based on KAF) and SEKAI (based on ISEKAIJOUCHO) are the current core products.

Contact: [email protected]

References