GANYMEDE Inc. announced the UltraLMTM VTuber brand debut on September 28, 2026, and on October 1 announced that streamer Haseshin joined the CREATOR division of ZETA DIVISION. The company works both sides of the creator and VTuber business.
GANYMEDE's two most recent announcements both run through ZETA DIVISION, the pro esports team whose CREATOR division holds k4sen and now Haseshin. The older of the two stories covers the September 28 reveal of UltraLMTM, a VTuber brand produced by k4sen, with six first-generation members: Riina Koga Fluorite, Amari Mahiru, Yuime Yuina, Hanasake Sei, Washimi Daisho, and Yayoi Chiu. Their first streams run over two days at 19:00 each day, three members on Monday, October 5 and three on Tuesday, October 6, each on a separate YouTube channel, with a program on the UltraLMTM official channel from 20:30 each day featuring that day's three and k4sen.
The newer story moves in a different direction. GANYMEDE announced Haseshin's signing to the CREATOR division on October 1, a group the company describes as separate from the team's competitive rosters. Haseshin has streamed games since 2011, plays mainly FPS titles, and has 950,000 YouTube subscribers as of the announcement. The company also published a joining announcement movie on YouTube.
Together the two stories show GANYMEDE building its creator side rather than its pro-player side. One story expands a brand under k4sen's production; the other adds a long-running streamer to ZETA DIVISION's creator ranks. Both announcements arrive with their own supporting material: the UltraLMTM reveal shipped with profiles, visuals, a trailer, and X accounts for the six members, while the Haseshin news came with the announcement movie and a profile listing a birth date of October 31, 1995 and favorite foods of hamburgers, onigiri, and lasagna, though a second announcement profile lists hamburger steak instead of hamburgers.
Synthesized by Yomimono from the cited Yomimono stories below, each itself
sourced, then editorially reviewed. Every
fact links the story it came from.
Oct 3
GANYMEDE announced on October 1 that streamer Haseshin has joined the CREATOR division of pro esports team ZETA DIVISION. The company also released a joining announcement movie on YouTube. Haseshin has streamed games since 2011, and their YouTube channel has 950,000 subscribers as of the announcement. Known for rapid-fire Kansai-dialect talk and a bright personality, Haseshin plays a range of titles, mainly FPS games, and appears at events beyond streaming. In a comment, Haseshin said they will keep working energetically in the new environment to deliver energy to as many people as possible, and asked for support at ZETA DIVISION. Haseshin's published profile lists a birth date of October 31, 1995, favorite foods of hamburgers, onigiri, and lasagna, and a motto about not forgetting who they are, while the profile from a second announcement lists hamburger steak, onigiri, and lasagna.
Sep 28
GANYMEDE Inc. announced on September 28, 2026 that six creators will debut under UltraLMTM, the VTuber brand produced by streamer k4sen, who belongs to the CREATOR division of the esports team ZETA DIVISION. The six are Riina Koga Fluorite, Amari Mahiru, Yuime Yuina, Hanasake Sei, Washimi Daisho, and Yayoi Chiu. First streams run over two days at 19:00 each day: three members on Monday, October 5 and three on Tuesday, October 6, each on their own YouTube channel. From 20:30 each day, the three who streamed plus k4sen appear on a program on the UltraLMTM official channel. Profiles, visuals, a trailer, and X accounts for all six launched with the announcement. The brand's stated concept is "Beyond imagination, ideals squared."