Kageyama Shien

Who is Kageyama Shien?

Kageyama Shien is a male Japanese VTuber and singer affiliated with hololive production’s male talent branch HOLOSTARS. He debuted as a talent on April 30, 2020 and appears primarily in Japanese-language streams and music videos.

His official character bio describes him as a mafia boss from the land of beastmen who came to this world searching for a missing best friend. He is presented as an entertainer whose work mixes gaming, live chat, and musical performance.

Background & mission

Kageyama Shien’s public profile emphasizes a playful fictional backstory that shapes his on-stream persona and storytelling. That backstory is central to his character identity and informs his tone during streams and stage performances.

Creator & studio

Kageyama Shien is managed by hololive production, operated by COVER Corporation, and is listed as a member of HOLOSTARS 3rd Generation on the agency’s official talent pages.

Visual style & aesthetics

Visually, Kageyama Shien is depicted with beastman traits consistent with his mafia-boss motif. Official imagery and stage assets present a distinctive costume and character design that blends stylish, stage-ready clothing with animal-inspired features.

His official profile lists an illustrator credit and a measured character height, reflecting the polished production values typical of hololive talents.

Persona & content

Kageyama Shien’s on-stream persona mixes boisterous, theatrical elements with friendly interactions. He balances roleplay elements from his character backstory with casual chat, humor, and performances that highlight his vocal abilities.

He is active in live streams, cover songs, and group music projects produced under the HOLOSTARS banner. Singing and vocal-focused content are regular parts of his output alongside gaming and variety streams.

Content Type & Format

Kageyama Shien’s content primarily appears as livestreams and archived videos on YouTube, where he posts full-length streams, music videos, and occasional shorter clips. His videos include singing performances, gameplay sessions, talk shows, and special event streams.

Kageyama Shien’s personality shapes much of his content: viewers can expect character-driven banter, roleplay elements tied to his mafia-boss persona, and moments that spotlight his singing. Kageyama Shien’s content often blends scripted segments with improvisational chat and multiplayer gaming.

On platform formats, he uses long-form live streams for real-time interaction, edited uploads and music videos for polished performances, and social posts on X for announcements and short updates. His videos and streams are tailored to fans who enjoy music, gaming, and character-led variety entertainment.

Platforms & music

Kageyama Shien maintains an official YouTube channel for streams and music content and an X account for updates and fan engagement. He participates in HOLOSTARS music releases and official group projects organized by hololive production.

Narrative & trivia

Fans refer to his fanbase by the name Shiengumi, and his birthday is listed as February 25. His debut stream date is April 30, 2020, which marks his official introduction as a HOLOSTARS talent.