Hoshimachi Suisei

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Hoshimachi Suisei (星街すいせい) is a Japanese singer, songwriter, and virtual YouTuber. She began posting videos as an independent creator in March 2018. In May 2019, she became affiliated with Hololive Production through their newly created music label, INoNaKa Music, before joining the agency's main branch later the same year. Her YouTube activity consists primarily of live streaming herself singing karaoke, playing video games, talking to her fans, or collaborating with other talents. She is particularly well known among fans for her skill at Tetris and her singing ability. As of September 2026, she has 2.91 million subscribers and 1.78 billion views on YouTube. As a singer, she has released three studio albums, as well as two extended plays under her side project Midnight Grand Orchestra with producer Taku Inoue, all of which have debuted within the top ten on the Oricon Albums Chart. Outside of her streaming and musical activity, she has appeared on Japanese television and radio programs...

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