Hakui Koyori has an unannounced release date for Entergram's adventure game Koyoronium, whose official site opened October 22 with a follow-up news date of November 19. Her second album Chemical Spark is set for December 2, 2026, ahead of her first solo live at Tokyo Garden Theater on December 22.
Between September and October 2026, Hakui Koyori's activity splits across games, music, and merchandise. Entergram announced the novel game Koyorium on September 17, starring and supervised by Koyori. The company said supervision means involvement from the planning stage, shaping setting and story rather than signing off on a finished product. The announcement came with a Tokyo Game Show 2026 booth (Hall 3, stand 03-N05), a key visual, a signed standee, a message video, and a photo hashtag sticker giveaway. The teaser site was to become the official site on October 22.
That date arrived. On October 22, Entergram opened the official site under the title Koyoronium. The story follows Koyori, a science-loving senior who founds the Future Science Club alone, and the protagonist who joins as Assistant-kun. The site carries story, character information, and event stills. The release date and product details are still undecided, and Entergram points to November 19 for the next news.
Music gives Koyori two anchor dates. Cover Corp. will release her second album, Chemical Spark, on December 2, 2026. It collects Baku Love + Chemistry, produced by Nayutalien, Kanseitou yori, produced by Akita Horie, and new songs plus CD-exclusive tracks. Her first live, Hakui Koyori 1st Live Dream Spark, is set for December 22 at Tokyo Garden Theater. Ahead of it, she released the original song RISING Acid on October 11, written, composed, and arranged by Kenmochi Hidefumi, with science producer Yonezuka Denjiro as a guest and a music video directed by kanauru.
Retail coverage fills out the picture. Tokyo Otaku Mode carries a Nendoroid figure of Koyori at 7,200 yen, about 10 cm in the 2.5-head-tall style, with expression, hand, foot, and optional parts, alongside figures of Houshou Marine, Tokoyami Towa, Himemori Luna, Takanashi Kiara, and Roboco-san.
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Oct 22
Entergram opened the official website for the adventure game Koyoronium on October 22. hololive VTuber Koyo Koyori is lead performer and supervisor. The story follows Koyori, a science-loving senior who founds the Future Science Club alone, and the protagonist who joins as Assistant-kun. The site released story, character information, and event stills. Release date and product details are undecided; follow-up news is scheduled for November 19.
Oct 11
Hakui Koyori released the original song RISING Acid on October 11, 2026. Kenmochi Hidefumi wrote the lyrics, composed, and arranged it, and science producer Yonezuka Denjiro appears as a special guest. The music video, directed by kanauru, is built around a dance and experiment theme. A solo live, Hakui Koyori 1st Live Dream Spark, is set for December 22 at Tokyo Garden Theater.
Oct 5
Tokyo Otaku Mode now carries Nendoroid figures of several hololive VTubers. Hakui Koyori is 7,200 yen, Houshou Marine's OL Outfit Ver. is 7,500 yen, and Tokoyami Towa, Himemori Luna, and Takanashi Kiara are 7,900 yen each. Roboco-san is 7,200 yen. Each figure stands about 10 cm in the 2.5-head-tall Nendoroid style and ships with expression, hand, foot, and optional parts.
Sep 17
Entergram published a teaser site on September 17 for Koyorium, a novel game starring and supervised by hololive VTuber Koyori Hakui. Hakui is part of the hololive sixth-generation unit Secret Society holoX, where she appears as a researcher. The game is on display at the Entergram booth in Hall 3, stand 03-N05, at Tokyo Game Show 2026, which runs at Makuhari Messe from September 17 to 21. The booth shows a large key visual, a standee bearing a handwritten signature, and a message video from Hakui. Visitors who photograph the key visual or standee, post the image with the hashtag Koyorium, and show the screen to booth staff receive a key visual sticker while the daily supply lasts. Supported platforms, release date, price, and story details are unannounced. The teaser site is scheduled to open as the official site on October 22, with updates promised via Entergram's website and its official X account.
Sep 12
Cover Corp. will release Hakui Koyori's second album, Chemical Spark, on Wednesday, December 2, 2026. The hololive member's album collects Baku Love + Chemistry, produced by Nayutalien, and Kanseitou yori, produced by Akita Horie, plus new songs and CD-exclusive tracks. A first live concert, Hakui Koyori 1st Live Dream Spark, is set for Tuesday, December 22, 2026 at Tokyo Garden Theater, with details to follow.