{"rewrite":{"id":"r_d87723c9af1a8f2658d32b08","clusterId":"c_ce70d0788c5864d286a0c2d2","slug":"ultralmtm-reveals-six-first-generation-vtuber-debuts-for-october","model":"deepseek-v4-1-flash","headline":"UltraLMTM Reveals Six First-Generation VTuber Debuts for October","summary":"k4sen's VTuber project UltraLMTM announced the profiles of six first-generation members during an announcement program called \"LMTiMes!\" The six are Riina Koga Fluorite, Amari Mahiru, Yuina Yume, Sei Hanasake, Daiwarai Washimi, and Chiu Yachiyachi. Debut streams are split across two days: Riina Koga Fluorite, Amari Mahiru, and a third member stream first on Monday, October 5, with Sei Hanasake, Daiwarai Washimi, and Chiu Yachiyachi following on Tuesday, October 6. UltraLMTM is produced by GANYMEDE, the company behind the professional esports team ZETA DIVISION, which k4sen belongs to. GANYMEDE is headquartered in Minato-ku, Tokyo, and lists Daisuke Nishihara as representative director. The group's name is read Urutora Rimitemu in Japanese. The announcement program ran ahead of the October debut window.","whyItMatters":"The debut calendar splits the six members into two groups of three on consecutive days, a staggered rollout rather than a single launch event.","webCardHtml":"\u003cp\u003eThe debut schedule pairs each day\u0026#39;s earlier finishers with the members streaming after them: on October 5 and October 6, those who complete their first streams appear alongside the next batch, according to the announcement program. The six members are Riina Koga Fluorite, Amari Mahiru, Yuina Yume, Sei Hanasake, Daiwarai Washimi, and Chiu Yachiyachi, whose profiles and visuals were released together with the schedule.\u003c/p\u003e\u003cp\u003eUltraLMTM sits under GANYMEDE, the Tokyo company that also operates ZETA DIVISION, the professional esports team k4sen belongs to. GANYMEDE\u0026#39;s listed representative director is Daisuke Nishihara, and the company is based in Minato-ku. The group name is written in Latin letters and read Urutora Rimitemu. The announcement arrived through a dedicated program titled \u0026#34;LMTiMes!\u0026#34; rather than a press release alone, ahead of the October debut.\u003c/p\u003e","blueskyPost":"UltraLMTM's debut streams are split across two days, which means the first three members absorb the opening-night attention and the second wave has to build its own audience from a colder start.","twitterPost":"UltraLMTM's two-day debut split means the October 6 members start without the opening-night audience the first three inherit.","threadsPost":"UltraLMTM is splitting its six debuts across October 5 and October 6, so the second group starts a day behind on the audience the first three build. GANYMEDE, the company behind ZETA DIVISION, is producing the group k4sen fronts.","newsletterBlurb":"k4sen's VTuber brand UltraLMTM has named its first six members and set a two-day debut window in October. Riina Koga Fluorite and Amari Mahiru headline the October 5 group, with three more streaming October 6. GANYMEDE, which also operates ZETA DIVISION, produces the brand.","attributionJson":"[{\"source\":\"KAI-YOU\",\"url\":\"https://kai-you.net/article/96688\",\"title\":\"Details Revealed for 1st Generation of k4sen-Produced VTuber Group \\\"UltraLMTM\\\"\"},{\"source\":\"PANORA\",\"url\":\"https://panora.tokyo/archives/158232\",\"title\":\"Six Debut from k4sen-Produced VTuber Brand \\\"UltraLMTM\\\" - Visuals and Profiles Released\"}]","lintFlagsJson":null,"lintHits":0,"costUsd":0,"inputTokens":5098,"outputTokens":974,"status":"published","repairAttempts":0,"nextRepairAt":null,"factsAttemptedAt":1790609362,"createdAt":"2026-09-28T15:23:33.000Z","publishedAt":"2026-09-28T15:28:20.000Z","updatedAt":"2026-09-28T15:28:20.000Z"},"cluster":{"id":"c_ce70d0788c5864d286a0c2d2","canonicalTitle":"k4senがプロデュースするVTuberグループ「UltraLMTM」1期生の詳細が解禁","representativeArticleId":"a_85b2768b73557c83f70ce506","sourceCount":2,"writtenSourceCount":2,"writeAttempts":0,"isSolo":false,"entitiesJson":"{\"anime_titles\":[],\"manga_titles\":[],\"work_titles\":[\"UltraLMTM\"],\"studios\":[\"GANYMEDE\",\"ZETA DIVISION\"],\"people\":[\"k4sen\",\"Riina Koga Fluorite\",\"Amari Mahiru\",\"Yume Yuina\",\"Hanasake Sei\",\"Washimi Daisho\",\"Yayoi Chiu\"],\"type\":\"announcement\",\"domain\":\"vtuber\",\"is_roundup\":false}","contentType":"news","status":"published","firstSeenAt":"2026-09-28T11:19:00.000Z","lastSeenAt":"2026-09-28T12:27:30.000Z","updatedAt":"2026-09-28T15:28:20.000Z"},"attribution":[{"source":"KAI-YOU","url":"https://kai-you.net/article/96688","title":"k4senがプロデュースするVTuberグループ「UltraLMTM」1期生の詳細が解禁"},{"source":"PANORA","url":"https://panora.tokyo/archives/158232","title":"k4senがプロデュースするVTuberブランド「UltraLMTM」から6名がデビュー　ビジュアル・プロフィールが公開"}],"entities":{"anime_titles":[],"manga_titles":[],"work_titles":["UltraLMTM"],"studios":["GANYMEDE","ZETA DIVISION"],"people":["k4sen","Riina Koga Fluorite","Amari Mahiru","Yume Yuina","Hanasake Sei","Washimi Daisho","Yayoi Chiu"],"type":"announcement","domain":"vtuber","is_roundup":false},"keyFacts":["UltraLMTM's first generation has six members: Riina Koga Fluorite, Amari Mahiru, Yuina Yume, Sei Hanasake, Daiwarai Washimi, and Chiu Yachiyachi.","Riina Koga Fluorite, Amari Mahiru, and a third member hold their first streams on Monday, October 5.","Sei Hanasake, Daiwarai Washimi, and Chiu Yachiyachi hold their first streams on Tuesday, October 6.","UltraLMTM is produced by GANYMEDE, the company behind the professional esports team ZETA DIVISION, which k4sen belongs to.","GANYMEDE is headquartered in Minato-ku, Tokyo, and lists Daisuke Nishihara as representative director."]}