k4sen's UltraLMTM VTuber project has set an October 5 and October 6 debut window for six first-generation members, announced during the "LMTiMes!" program. He remains active in ZETA DIVISION and as a streamer across game events, most recently the Persona 4 Revival stage at Tokyo Game Show 2026.
k4sen's year of appearances across games and streaming has been steady, but his own projects have moved in a clear direction. In June 2026, he revealed Shinpo-kun, a white fluffy mascot with Live2D modeling and interchangeable parts, designed by illustrator Touma Yuu and used primarily for YouTube streams from home. That followed a hyper-realistic 2018 model and a 2024 realistic avatar made for the Qiddiya Gaming booth at Tokyo Game Show.
The larger bet is UltraLMTM, a VTuber project produced by GANYMEDE, the company behind ZETA DIVISION, which k4sen belongs to. Three months after the Shinpo-kun reveal, UltraLMTM named six first-generation members during an announcement program called "LMTiMes!": Riina Koga Fluorite, Amari Mahiru, Yuina Yume, Sei Hanasake, Daiwarai Washimi, and Chiu Yachiyachi. Debut streams are split across two days, three on Monday, October 5 and three on Tuesday, October 6.
Outside those projects, k4sen has been a recurring presence in stage programming. He appeared with voice actor Baitai Saka and streamer Bodoka in a three-way time attack battle for Netmarble's Solo Leveling: KARMA at TGS2026, and with director Daisuke Yajima and Clutch_Fi at the Persona 4 Revival stage. In July, ZETA DIVISION added Sonic the Hedgehog to its CREATOR division for a limited summer period, an addition the team tied to the February event 'Sonic Racing CrossWorlds The k4sen.' The streamer's own offline event, The k4sen Con 2026, added Junichi Kato, Moko, Oniya, and Yuyuta to its Real Buckshot Roulette stage content on August 8.
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4d ago
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.
Sep 19
Atlus brought Persona 4 Revival to Tokyo Game Show 2026 with a playable story-mode demo and a stage event on September 19 headlined by director Daisuke Yajima and ZETA DIVISION players k4sen and Clutch_Fi. The stage showed the Marie Social Link for the first time, in an event absent from the demo: a blue door in the Inaba Central Shopping District leads to the Velvet Room, where Margaret, Marie, and Igor appear, and eating at shops or viewing scenery with Marie raises her Social Link rank. Hands-on impressions describe a full remake of the 2008 game with redrawn character proportions and backgrounds matching Persona 5 and Persona 3 Reload, a new battle UI, newly recreated BGM including a new arrangement of "Reach Out To The Truth," and fully re-recorded voice work. The demo covered an early episode in which the protagonist confronts Yosuke Hanamura's Shadow.
Sep 2
Netmarble opened a special site for Solo Leveling: KARMA ahead of TGS2026, which runs September 17 to 21 at Makuhari Messe. The site details a September 20 stage event with cosplayers Iori Moe and Manasou, plus a three-way time attack battle featuring voice actor Baitai Saka and streamers k4sen and Bodoka. Booth giveaways include a cooling poncho, pouch, stickers, and a mouse pad. The game is planned for iOS and Android.
Jul 8
Sega's mascot Sonic the Hedgehog has joined the CREATOR division of professional esports team ZETA DIVISION for a limited summer period, the team announced on July 8, 2026. The surprise addition follows a February event called 'Sonic Racing CrossWorlds The k4sen,' where Sonic won a race and caught the attention of popular streamer k4sen. According to the announcement, Sonic and k4sen both celebrate their 35th anniversary this year, which served as a catalyst for the collaboration. Sonic reportedly said he could not sit still when hearing about hot challenges on the best stage. ZETA DIVISION is also marking its own 5th anniversary with a pop-up event in Tokyo from July 31 to August 2. Additional merchandise includes a collaboration gaming PC and LINE stamps featuring the team's mascot ZETA-kun. The team plans to develop various content with Sonic's involvement during the summer period.
Jul 8
Streamer k4sen's offline event The k4sen Con 2026 has added Junichi Kato, Moko, Oniya, and Yuyuta to its lineup. The four will appear in the stage content Real Buckshot Roulette on DAY1, August 8. Kato was previously scheduled for the same project in 2024 but withdrew before the event.
Jun 23
Sony announced the INZONE H9 II LTK 2026 LIMITED EDITION, a wireless gaming headset designed in collaboration with the League The k4sen event. The headset features the event logo on the housing and is available for pre-order through the ZETA DIVISION store until July 1, 2026, for 41,800 yen, with shipping expected around late September.
Jun 15
Streamer k4sen revealed a new VTuber form on a June 14 Twitch stream. The character, named Shinpo-kun, is a white fluffy mascot with Live2D modeling and interchangeable parts, designed by illustrator Touma Yuu. It will be used primarily for YouTube streams from home. This is k4sen's third VTuber transformation, following a 2018 hyper-realistic model and a 2024 realistic avatar for the Qiddiya Gaming booth at Tokyo Game Show.