Suisei Hoshimachi Becomes First VTuber to Perform at Rock in Japan Festival
The booking signals the continued crossover of VTuber talent into mainstream Japanese music festival lineups, following Hoshimachi's earlier appearance at Rockin' On Japan's year-end festival COUNTDOWN JAPAN.
Reporting from 2 sources: KAI-YOU, PANORA.
Hololive VTuber Suisei Hoshimachi will perform at ROCK IN JAPAN FESTIVAL 2026, making her the first VTuber to appear at the major outdoor rock festival. The announcement came on May 20, 2026, when the festival's official account released the first wave of artists. Hoshimachi is scheduled to perform on Day 3, Saturday, September 19, at Soga Sports Park in Chiba. The day's lineup also includes =LOVE, KANA-BOON, CUTIE STREET, Chevon, Singers High, Zutto Mayonaka de Ii no ni., CHiCO with HoneyWorks, DISH//, NEE, Neguse., NOMELON NOLEMON, Hambreaders, Marcy, muque, yama, and Young Skinny. Hoshimachi is a VTuber and virtual idol who debuted in 2018 and has 2.88 million YouTube subscribers. She is affiliated with hololive and her own personal office Studio STELLAR. In 2024, her music video for "Bibbidiba" reached 100 million views, the fastest for a VTuber. She previously performed at COUNTDOWN JAPAN 24/25, also organized by Rockin' On Japan, in December 2024. ROCK IN JAPAN FESTIVAL 2026 runs over five days from September 12 to 21.
Hoshimachi commented on X after the announcement, writing, "I'm joining the summer outdoor stage!! I'm already looking forward to singing there." She is a VTuber and virtual idol who debuted in 2018 and has 2.88 million YouTube subscribers. She is affiliated with hololive, operated by Cover Corporation, and with her own personal office Studio STELLAR, which was established to strengthen her solo activities. In 2024, the music video for her song "Bibbidiba" reached 100 million views, the fastest for a VTuber in history.
She has also expanded into anime tie-ups. She performed the ending theme "Mou Dounatte mo Ii ya" for the TV anime Mobile Suit Gundam GQuuuuuuX and the opening theme "Tsuki ni Mukatte Ute" for the TV anime Mayonaka Heart Tune. Her most recent festival appearance before this booking was at CENTRAL MUSIC & ENTERTAINMENT FESTIVAL 2026 in Yokohama in April.
ROCK IN JAPAN FESTIVAL is organized by music media Rockin' On Japan. It started in 2000 and was originally held at Hitachi Seaside Park in Ibaraki Prefecture before moving to Soga Sports Park in Chiba City. The festival is often cited as one of Japan's four major festivals, alongside FUJI ROCK FESTIVAL, SUMMER SONIC, and RISING SUN ROCK FESTIVAL. Hoshimachi previously performed at Rockin' On Japan's year-end festival COUNTDOWN JAPAN 24/25 in December 2024, alongside Nijisanji's Sasaki Saku.
Synthesized by Yomimono from the 2 cited sources below, including Japanese-language reporting where cited, then editorially reviewed before publishing.