Hoshimachi Suisei

Hoshimachi Suisei (Japanese: 星街すいせい) is a Japanese singer, songwriter and virtual YouTuber affiliated with hololive, part of Hololive Production run by Cover Corp. She is known for her singing, her original music releases and her skill at Tetris.

Profile

Item	Detail
Debut	22 March 2018 (independent); joined Hololive Production on 19 May 2019
Agency	Hololive Production (Cover Corp.)
Former affiliation	INoNaKa Music (2019); S:gnal (July–August 2018)
Side project	Midnight Grand Orchestra (with Taku Inoue)
Character designer	Herself (original design); Teshima Nari (updated design)
Live2D	rariemonn
3D model	Yatsurugi

Career

Hoshimachi created her YouTube channel on 18 March 2018. The same day, she showed her first character design and model on Twitter. She drew and rigged that model herself. She posted her first video on 22 March 2018 and debuted as an independent virtual YouTuber who called herself an idol. She was a member of the VTuber group S:gnal from 2 July to 4 August 2018. She released her first original song, "Comet", on 22 November 2018, and her second, "Tenkyū, Suisei wa Yoru o Mataide", on 22 March 2019.

On 19 May 2019, she joined Hololive Production through INoNaKa Music, a new music label. She moved to the main hololive branch on 1 December 2019 and got a new Live2D model based on an updated design. She started streaming on bilibili in October 2019. She debuted her 3D model with a concert on 1 March 2020, and her following on that platform grew a great deal afterward. Her first single under Cover Corp., "Next Color Planet", came out on 22 March 2020. Her 2021 single "Ghost" reached first place on Oricon's daily digital single ranking. It was also the first VTuber-produced song to appear on Oricon's weekly single ranking.

She released her first album, Still Still Stellar, on 29 September 2021, and held her first paid concert, "STELLAR into the GALAXY", at Toyosu PIT on 21 October 2021. In March 2022, she started Midnight Grand Orchestra with composer Taku Inoue under Toy's Factory. On 20 January 2023, she became the first VTuber to perform on The First Take, singing "Stellar Stellar". Her second album, Specter, followed on 25 January 2023. The music video for "Bibbidiba" passed 100 million views in November 2024. In fall and winter 2024, she held her first live tour, "Spectra of Nova". On 1 February 2025, she performed at the Nippon Budokan, a goal she had held throughout her career.

Activities

Streaming style

Her YouTube streams are mostly karaoke, video games, talks with fans and collaborations with other talents. Tetris is one of her best-known games. She also streams on bilibili and has appeared on Japanese television and radio programs as a virtual personality.

Music and works

"Comet" (2018) and "Tenkyū, Suisei wa Yoru o Mataide" (2019), original songs
"Next Color Planet" (2020) and "Ghost" (2021), digital singles
Still Still Stellar (2021), first studio album
Specter (2023), second studio album
"Bibbidiba" (2024), single
Two extended plays as Midnight Grand Orchestra, including the single "SOS" (2022)

Characteristics

Hoshimachi presents herself as an idol and puts music at the center of her work. She has released three studio albums, and two extended plays with Midnight Grand Orchestra. All of them debuted in the top ten of the Oricon Albums Chart. She also started Hoshimatic Project, a hololive idol unit, which appeared as a guest on her 2024 tour.