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Hoshimachi Suisei
Hoshimachi Suisei is an active hololive production talent and virtual idol who runs her own personal agency, Studio STELLAR, while continuing group and collaborative activities. She is set to appear in the miComet event in "Holodori" starting August 7, 2026, and recently threw a ceremonial first pitch with Hatsune Miku at a Lotte Marines game.
Synthesized from 9
Yomimono stories · updated
Aug 19
Hoshimachi Suisei announced the launch of her personal agency, Studio STELLAR, during an acoustic live stream on March 22, marking her 8th anniversary and birthday. The agency manages her solo artist activities, including music production, streaming, merchandise sales, and fan club operations, in collaboration with COVER Corporation and the newly established NERD Inc. NERD Inc. also manages TAKU INOUE and the group Midnight Grand Orchestra, and describes itself as an independent artist agency for extraordinary talents. Suisei continues group and collaborative activities as a hololive production talent.
The agency launch coincided with a restart of Midnight Grand Orchestra, the music project she leads with TAKU INOUE. The project announced its first EP, Travelogue I, releasing August 19, and a second solo live concert, "Project:Allegro," scheduled for February 2027. Suisei also announced a 2026 arena tour titled "Once upon a Stellar" across four cities: Yokohama, Kobe, Nagoya, and Fukuoka.
Outside her solo work, Suisei remains active in collaborations. She and Sakura Miko, as the unit miComet, are featured in a JOYSOUND karaoke collaboration running from June 13 to July 30, with original merchandise and a voice-recorded alarm clock prize. She also appeared in Lotte's Coolish and Sou ice cream commercials alongside Hatsune Miku, singing the song "Ao no Sumika" by Tatsuya Kitani, and threw the ceremonial first pitch at a Chiba Lotte Marines game on July 20, with Miku appearing on the stadium screens. In "Holodori," the first official smartphone game for hololive, the miComet event "Syncing Summer Sparkle" begins August 7, adding three songs by the duo.
Key facts
- Personal agency launch
- Hoshimachi Suisei launched her personal agency, Studio STELLAR, during an acoustic live stream on March 22, marking her 8th anniversary and birthday. ↗
- Agency management structure
- Studio STELLAR manages Suisei's solo artist activities in collaboration with COVER Corporation and NERD Inc., which also manages TAKU INOUE and Midnight Grand Orchestra. ↗
- Arena tour
- Suisei announced a 2026 arena tour titled "Once upon a Stellar" across Yokohama, Kobe, Nagoya, and Fukuoka. ↗
- Midnight Grand Orchestra EP
- Midnight Grand Orchestra, led by Suisei and TAKU INOUE, will release its first EP Travelogue I on August 19. ↗
- Second live concert
- Midnight Grand Orchestra will hold a second solo live concert, "Project:Allegro," in February 2027. ↗
- JOYSOUND collaboration
- The miComet unit, comprising Sakura Miko and Hoshimachi Suisei, collaborated with JOYSOUND from June 13 to July 30 at 60 stores nationwide. ↗
- Ceremonial first pitch
- Suisei threw the ceremonial first pitch at the Chiba Lotte Marines vs. Fukuoka SoftBank Hawks game on July 20, 2026 at ZOZO Marine Stadium, with Hatsune Miku appearing on the stadium screens. ↗
- Lotte commercial
- Suisei and Hatsune Miku appeared in a commercial for Lotte's Coolish and Sou brands, singing "Ao no Sumika" by Tatsuya Kitani, released July 3. ↗
- Holodori event
- The miComet event "Syncing Summer Sparkle" in "Holodori" begins August 7, 2026, adding three songs by the duo. ↗
Timeline
- Aug 6, 2026 Holodori Next Event Features miComet, Details Set for August 6
- Jul 14, 2026 Hololive VTubers Tackle Steins;Gate Escape Game Ahead of RE:BOOT Release
- Jul 11, 2026 Hatsune Miku and Hoshimachi Suisei to Throw Ceremonial First Pitch
- Jul 10, 2026 Hoshimachi Suisei to Throw Ceremonial First Pitch With Hatsune Miku at ZOZO Marine Stadium
- Jul 9, 2026 Hoshimachi Suisei to Throw First Pitch, Hatsune Miku to Appear at Lotte Marines Game
- Jun 29, 2026 Hoshimachi Suisei and Hatsune Miku Likely in New Lotte Ice Cream Commercials
- Jun 5, 2026 Hololive's MiComet Teams With JOYSOUND for Collab Goods and Karaoke Rooms
- May 31, 2026 Hoshimachi Suisei Launches Own Agency Studio STELLAR
- May 28, 2026 Midnight Grand Orchestra Announces First EP Travelogue I
Synthesized by Yomimono from the cited Yomimono stories below, each itself
sourced, then editorially reviewed. Every
fact links the story it came from.
Facts
- Noted
- Based on the silhouettes and credits for Studio STELLAR, Cover Corporation, and Crypton Future Media, the artists are believed to be VTuber Suisei Hoshimachi and VOCALOID Hatsune Miku. · 2026-06-29
- Announced
- launch of her personal agency, Studio STELLAR · 2026-05-31
Connections
Structured graph also available as JSON at /public/entities/hoshimachi-suisei.
CC BY 4.0.
Claim activity
When a claim about Hoshimachi Suisei was confirmed, debunked, or disputed against
open-web sources. The record stays even after a claim drops off the facts list.
- Confirmed launch of her personal agency, Studio STELLAR May 31 · source
- Confirmed hoshimachi suisei produces travelogue i May 28 · source
- Disputed hoshimachi suisei produces travelogue i May 28 · source
All coverage
Aug 19
Midnight Grand Orchestra, the unit formed by Hoshimachi Suisei and TAKU INOUE, released its first EP Travelogue I on August 19. The four-track release includes Hyper Vip, Nonsense, Flash, and 404, and adds strings such as violin, viola, and cello to the unit's club sound. The EP was originally planned as a limited first edition CD bundled with soundtrack music for an original anime project, but production problems at the external production company made the release timing uncertain, so the CD sales were canceled. Streaming and download distribution proceed as planned.
Aug 6
Cover announced that the next in-game event for the rhythm and RPG "hololive Dreams" ("Holodori") will feature the unit miComet, consisting of Sakura Miko and Hoshimachi Suisei. The event, titled "Syncing Summer Sparkle," is scheduled to begin on August 7, 2026, at 12:00. Alongside the event, three songs by the duo will be added to the game, and players can obtain miComet event memories by participating. The announcement follows a teaser on the official X account that hinted at the two talents with an ocean background and icons on their outfits. The first in-game event, "Hello! Brand New Summer!," ended on August 5, and details for the next event were scheduled to be revealed on August 6 at 18:00. "Holodori" is the first official smartphone game for the VTuber group hololive, developed jointly by Cover and QualiArts, and released on July 23. It surpassed 1 million downloads the day after release. The game is available on iOS, Android, and PC via Steam with a free-to-play model.
Jul 14
Shirakami Fubuki and Hoshimachi Suisei played a browser-based real escape game based on Steins;Gate, encountering a freeze that forced a restart. The article also recalls Oozora Subaru and Usada Pekora's first-time reactions to the series. The piece promotes the upcoming Steins;Gate RE:BOOT, which adds a new Gamma world line route.
Jul 11
Hatsune Miku and Hoshimachi Suisei will appear at the ceremonial first pitch of the Chiba Lotte Marines vs. Fukuoka SoftBank Hawks game on July 20, 2026 at ZOZO Marine Stadium. The appearance is tied to a new CM for Lotte's Coolish and Sou brands, released July 3, featuring the song 'Blue's Nest' by Tatsuya Kitani with character design by Kope Nishiki. A collaboration hotel room and train jack are also planned.
Jul 10
Hoshimachi Suisei will throw the ceremonial first pitch at the July 20 baseball game between the Chiba Lotte Marines and Fukuoka SoftBank Hawks at ZOZO Marine Stadium. Hatsune Miku will appear on the stadium's video screens to cheer during the ceremony. The appearance is tied to a new commercial for Lotte's Coolish and Sō products, in which both sing the song "Ao no Sumika" by Tatsuya Kitani. The commercial was released on July 3. Additional promotions include a collaboration room at Lotte City Hotel Kinshicho and a train jack on the Tokyo Metro Hibiya Line. Suisei commented, "I'll aim for a blazing fastball!!" The game starts at 17:00, with doors opening at 15:00 and the first pitch scheduled around 16:40. The event is part of Lotte's sponsored game day titled "A cold, blue summer has arrived. Coolish & Sō DAY." Crypton Future Media, the company behind Hatsune Miku, announced the appearance.
Jul 9
The Chiba Lotte Marines will host a sponsored game day on July 20, 2026, featuring Hoshimachi Suisei and Hatsune Miku. Suisei will throw the ceremonial first pitch before the game against the Fukuoka SoftBank Hawks, while Miku will appear on the stadium vision. Suisei said she aims for a fastball and will cheer the crowd.
Jun 29
Lotte's Coolish and Sou ice cream brands posted silhouette images of two singing artist groups for upcoming commercials. Based on the silhouettes and credits for Studio STELLAR, Cover Corporation, and Crypton Future Media, the artists are believed to be VTuber Suisei Hoshimachi and VOCALOID Hatsune Miku. The commercials will feature songs related to 'blue'.
Jun 5
On June 5, 2026, Chugai Mining announced a collaboration between the Hololive unit miComet-comprising Sakura Miko and Hoshimachi Suisei-and the karaoke chain JOYSOUND. The event runs from June 13 to July 30 at 60 JOYSOUND and affiliated stores nationwide, with goods available at 20 of those locations and online. The collaboration includes new original merchandise featuring the pair in two visual themes: a stadium jacket coordination and an after-school track suit coordination. Product highlights include life-size acrylic stands (2,200 yen each), trading can badges, trading acrylic stands, acrylic art boards, a magnet can caramel with a mini can badge, flake sticker sets, and a mini tambourine. For each collaboration menu item ordered in-store, customers receive one of eight random coaster designs. Purchases of 2,000 yen or more of collaboration goods in-store earn a random postcard bonus and one entry into a lottery for a newly recorded voice alarm clock, with 100 winners selected. The alarm clock campaign is in-store only; online purchases do not include entry postcards.
May 31
Virtual idol Hoshimachi Suisei announced the launch of her personal agency, Studio STELLAR, during an acoustic live stream on March 22, marking her 8th anniversary and birthday. The new agency will manage her solo artist activities, including music production, streaming, merchandise sales, and fan club operations, in collaboration with hololive production operator COVER Corporation and the newly established NERD Inc. NERD Inc., which also manages TAKU INOUE and the group Midnight Grand Orchestra, describes itself as an independent artist agency for extraordinary talents. Suisei will continue group and collaborative activities as a hololive production talent. She also revealed a new artist photo and a logo featuring a crown-like symbol. Alongside the agency launch, Suisei announced a 2026 arena tour titled "Once upon a Stellar" across four cities: Yokohama, Kobe, Nagoya, and Fukuoka. Midnight Grand Orchestra will resume activities and hold a second solo live concert, "Project:Allegro," in February 2027.
May 28
The music project Midnight Grand Orchestra, led by VTuber Suisei Hoshimachi and sound producer TAKU INOUE, will release its first EP Travelogue I on August 19. A new artist photo and a special website were unveiled May 27. Track details remain unrevealed as production continues. The EP marks a full-scale restart ahead of the February 2027 live concert Project: Allegro.