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「あなたの音楽を星界へ。」「あなたの星を世界へ。」
"Your music to the world of stars." "Your stars to the world."
 
— SEKAI, FINDME STORE Description

SEKAI (星界, 音楽的同位体 星界) is a Japanese Song Voice developed and distributed by KAMITSUBAKI STUDIO based on the virtual singer Isekaijoucho, and was released for CeVIO AI in April 2022.[1] She is part of the Musical Isotope Project.

On July 7, 2023, at the end of the "V.I.P -Virtual Isotope Phenomenon- 1st" livestream, it was announced that SEKAI would be released as a text-to-speech library for VOICEPEAK and was released on December 10, 2023.[2][3]

Her voice is provided by the virtual singer Isekaijoucho.[4]

Concept[]

SEKAI is advertised as a "Musical Isotope" (音楽的同位体) of her voice provider Isekaijoucho, similar to that of KAFU.[5] Her signature color is blue violet, specifically hex code #7933FF.[6]

Etymology[]

SEKAI's name is a shortened, stylized, portmanteau of her voice provider Isekaijoucho's name.

The kanji of her name, 星界 (SEKAI) translates literally to "world of stars."

Additionally, the name "SEKAI" shares its romanization with Isekaijouchoo's character "Yorukawa Sekai" (夜河世界) from KAMITSUBAKI CITY UNDER CONSTRUCTION. (神椿市建設中。) So far, this trait is also shared by the other Musical Isotopes.

Appearance[]

SEKAI's appearance and theme are based on that of her voice provider Isekaijoucho with many similar design elements and an overall white color-scheme. SEKAI has long curly grey hair with thick bangs that cover her right eye. Her eyes are light blue with star-shaped irises. Atop her head sits two black star-like barrettes. Two long purple bangs hang down past her shoulders cut at a straight edge. She wears a heavy white coat with a squiggly purple pattern on it over a pair of black shorts. On her right hand she wears a black fingerless glove. Her right boot is tall and black, with purple lace and a skinny purple heel, and her left boot is short and black. On her left leg, she wears a purple sock embroidered with light purple textile shapes.

Relations[]

History[]

Marketing[]

On February 25, 2022, SEKAI's Twitter and YouTube accounts were created.[7].

On February 28, 2022, SEKAI's full illustration was released and an official website was created for her.[8] A 3D model of SEKAI was also debuted.[9]

Nico Nico Chokaigi
KAMITSUBAKI STUDIO BOOTH.

SEKAI was featured at the 2022 Nico Nico Chokaigi KAMITSUBAKI STUDIO Musical Isotope Project booth on April 29th and 30th alongside KAFU and upcoming vocalist RIME. Video content such as software introduction videos and artist music videos were projected, and panels featuring the Musical Isotopes were exhibited.[10] SEKAI's CeVIO AI Starter Pack was also released for sale early at the event.

KAFU and SEKAI Plush Dolls

On July 5th KAMITSUBAKI STUDIO announced a ARTIFICIAL SINGING SYNTHESIZER 1ST ANNIVERSARY PROGRAM livestream event to be held on July 7.[11][12] The event featured voice actress and singer Miyu Tomita joined by KAFU, SEKAI and guest starring voice providers Isekaijoucho, KAF and RIM who conducted a series of new announcements regarding the Musical Isotope Project.[13] The fourth announcement, in celebration of the project's 1st anniversary, is of two 12 cm plush dolls featuring KAFU and SEKAI. Pre-orders for the plush dolls would begin on July 7 through July 25 on the official FINDME STORE.

[14] The fifth announcement is of the creation of a new website portal for the Musical Isotope Project.[15][16] The sixth announcement is of a music and illustration contest revolving around SEKAI.[17]

Voicebanks[]

SEKAI
  • SEKAI (CeVIO AI), April 29, 2022
  • SEKAI TALK EXTENSION (VOICEPEAK), December 10, 2023.

Media featuring SEKAI[]

Search for media featuring SEKAI [show/hide]

Reputation[]

Status

Achievements

References[]

Navigation[]

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