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k4sen
k4sen is a ZETA DIVISION creator whose UltraLMTM VTuber brand debuted six members on October 5 and 6, and whose League The k4sen tournament is running its final season with 60 players. He is also on the guest list for Naoki's Room on Day 2 of FF14 Fan Festival 2026.
Synthesized from 14
Yomimono stories · updated
1d ago
k4sen's year runs through his own brands. GANYMEDE announced six VTubers under UltraLMTM, the brand k4sen produces for ZETA DIVISION, with debut streams on October 5 and 6 and k4sen appearing on the official channel program each night at 20:30. The first-generation roster is Riina Koga Fluorite, Amari Mahiru, Yuime Yuina, Hanasake Sei, Washimi Daisho and Yayoi Chiu. Kitsunejiro Uru, who joined UltraLMTM on October 6, entered League The k4sen in the NEXT tier days later.
The League The k4sen final season is the other throughline. It runs from October 15 to November 22 with four teams of 15 across NEXT, CORE and MASTERS tiers, and 60 players total. Six people join as LTK players for the first time: Kanae, Stunmi Japan, Jasper, Shishido Akari, Harucha and Nemoh. The format carries over from earlier seasons rather than switching to a condensed invitational. k4sen's own profile also reaches outside the tournament: he appears with Clutch_Fi at the Persona 4 Revival stage at Tokyo Game Show 2026, where Atlus showed the Marie Social Link, and with Bodoka in a three-way time attack battle at the Solo Leveling: KARMA stage on September 20.
Hardware and events carry the name too. Unitcom sells a League The k4sen Official Original Design Pillarless Model under its LEVEL∞ line from October 5, starting at 279,800 yen, with an LTK Special Box for qualifying orders through December 11. Sony's INZONE H9 II LTK 2026 LIMITED EDITION headset was up for pre-order through the ZETA DIVISION store until July 1 at 41,800 yen. The k4sen Con 2026 added Junichi Kato, Moko, Oniya and Yuyuta to Real Buckshot Roulette on DAY1, August 8. On the avatar side, k4sen revealed Shinpo-kun, a white mascot designed by Touma Yuu with Live2D modeling and interchangeable parts, on a June 14 Twitch stream, for use mainly on YouTube streams from home.
The most recent booking is FF14 Fan Festival 2026 at Makuhari Messe on October 31 and November 1, where k4sen is on the guest list for Naoki's Room, the Day 2 stage hosted by Naoki Yoshida and Toshio Murouchi. The posted list with him also includes Kuzuha, SHAKA, Karubi Akami, Clutch_Fi, Nekomugi Tororo, Obo, Uruka, Tonakaito, Sasatikk and Tatsuomi Hamada.
Key facts
- UltraLMTM debut streams
- Six members debuted over October 5 and 6 at 19:00, with k4sen on the official channel program from 20:30 each night ↗
- UltraLMTM first-generation members
- Riina Koga Fluorite, Amari Mahiru, Yuime Yuina, Hanasake Sei, Washimi Daisho and Yayoi Chiu ↗
- League The k4sen final season format
- Four teams of 15 across NEXT, CORE and MASTERS tiers, 60 players total, running October 15 to November 22 ↗
- First-time LTK players
- Kanae, Stunmi Japan, Jasper, Shishido Akari, Harucha and Nemoh join as LTK players for the first time ↗
- FF14 Fan Festival 2026 appearance
- k4sen is on the Naoki's Room guest list for Day 2, November 1, at Makuhari Messe ↗
- LEVEL∞ League The k4sen PC
- Unitcom sells the League The k4sen Official Original Design Pillarless Model from October 5, build-to-order from 279,800 yen ↗
- INZONE H9 II LTK 2026 LIMITED EDITION
- Pre-orders ran through the ZETA DIVISION store until July 1, 2026, at 41,800 yen ↗
- Shinpo-kun VTuber form
- A white mascot with Live2D modeling and interchangeable parts, designed by Touma Yuu, revealed on a June 14 Twitch stream ↗
- The k4sen Con 2026 Real Buckshot Roulette
- Junichi Kato, Moko, Oniya and Yuyuta appear on DAY1, August 8 ↗
- Persona 4 Revival TGS 2026 stage
- k4sen and Clutch_Fi appeared at the September 19 stage, where the Marie Social Link was shown ↗
Timeline
- Oct 19, 2026 Kuzuha Joins FF14 Fan Festival 2026 Day 2 Naoki's Room Guest List
- Oct 18, 2026 Kitsunejiro Uru Enters LTK Final Season As UltraLMTM Talent
- Oct 15, 2026 k4sen's League The k4sen Finale Opens Its Regular Stage
- Oct 8, 2026 League The k4sen Season Finale Set For 11 Days From October 15
- Oct 8, 2026 LTK Final Season Sets 60-Player Roster Across Four Teams
- Oct 6, 2026 VTuber Brand UltraLMTM Sets Six Debut Streams for October 5 and 6
- Oct 5, 2026 LEVEL∞ Adds League The k4sen Pillarless Gaming PC From 279,800 Yen
- Sep 28, 2026 k4sen-Produced VTuber Brand UltraLMTM Names Six First-Generation Members
- Sep 19, 2026 Persona 4 Revival Shows Marie Social Link At TGS 2026
- Sep 2, 2026 Solo Leveling: KARMA Opens TGS2026 Special Site with Stage Event Details
- Jul 8, 2026 Sonic the Hedgehog Joins Esports Team Zeta Division for One Summer
- Jul 8, 2026 Junichi Kato Returns to Real Buckshot Roulette at The k4sen Con 2026
- Jun 23, 2026 Sony Announces Inzone H9 II Ltk 2026 Limited Edition Headset
- Jun 15, 2026 Streamer K4sen Debuts Third Vtuber Form as White Mascot Shinpo-Kun
Synthesized by Yomimono from the cited Yomimono stories below, each itself
sourced, then editorially reviewed. Every
fact links the story it came from.
Facts
- Announced
- listed as a guest on Naoki's Room at FF14 Fan Festival 2026 (FF14 Fan Festival 2026) · 2026-10-19
- Announced
- hosts the final season of League The k4sen with Regular Stage Day 1 on October 15 at 18:00 (League The k4sen) · 2026-10-15
- Announced
- new VTuber form named Shinpo-kun · 2026-06-15
- Noted
- streamer in three-way time attack battle · 2026-09-02
Connections
Structured graph also available as JSON at /public/entities/k4sen.
CC BY 4.0.
Claim activity
When a claim about k4sen was confirmed, debunked, or disputed against
open-web sources. The record stays even after a claim drops off the facts list.
- Confirmed hosts the final season of League The k4sen with Regular Stage Day 1 on October 15 at 18:00 Oct 16 · source
All coverage
5d ago
Square Enix's official Final Fantasy XIV account announced on October 19 that VTuber Kuzuha will appear at FF14 Fan Festival 2026, set for October 31 and November 1 at Makuhari Messe. Kuzuha is one of the guests on Naoki's Room, the Day 2 stage hosted by producer Naoki Yoshida and Toshio Murouchi. The posted guest list for Naoki's Room also includes k4sen, SHAKA, Karubi Akami, Clutch_Fi, Nekomugi Tororo, Obo, Uruka, Tonakaito, Sasatikk and Tatsuomi Hamada. The announcement said scheduling had been worked out, leaving the impression the booking was settled late. The event is billed as the largest FF14 Fan Festival yet, run with AEON Mall Makuhari New City and Toyosuna Park, and the venue program covers activities, food menus, a piano concert and a special live performance alongside the guest stages.
6d ago
The final season of League The k4sen, k4sen's League of Legends tournament, opened on October 15. Kitsunejiro Uru, who calls herself a "God" and joined k4sen's UltraLMTM brand on October 6, lines up in the NEXT tier against top laners SHAKA, Kanou, and Tachibana Hinano, all streamers past 1 million YouTube subscribers. Sixty players across four teams compete on combined results from three tiers.
Oct 15
k4sen hosts the final season of League The k4sen, a League of Legends community tournament, with Regular Stage Day 1 on October 15 at 18:00. Sixty streamers are split into four teams of 15, each roster carrying five NEXT, five CORE and five MASTERS players. Kuzuha and Kanae of ChroNoiR, the full Gemagema group, and newcomers Kanae, Stunmi and Jasper are among the participants.
Oct 8
ZETA DIVISION-affiliated streamer k4sen will host "League The k4sen" Season: Finale, an 11-day tournament running October 15 to November 22. It uses the NEXT, CORE and MASTERS tiers across four teams, 15 members each, 60 players total, with a Regular Stage, MASTERS CUP and Playoffs. Kuzuha, Kukuri Aria, Takamiya Rion, Tachibana Hinano, Shishido Akari, Kanae, Kagura Mea, Shirona Shizuku, Tentei Forte and Astel Leda are among the participants.
Oct 8
The k4sen-hosted League of Legends event League The k4sen has announced all 60 participants for its final season, LTK Season: Finale. Dahlia Diadem, Camellia Crown, Iris Tiara, and Laurel Regalia each field 15 players across MASTERS, CORE, and NEXT tiers. Six people join as LTK players for the first time: Kanae, Stunmi Japan, Jasper, Shishido Akari, Harucha, and Nemoh. Play runs from October 15 through the November 21 and 22 playoffs.
Oct 6
GANYMEDE, which operates the esports team ZETA DIVISION, announced the visuals, profiles, and trailer for six VTubers debuting under UltraLMTM, a brand produced by ZETA DIVISION creator k4sen. The debut streams run October 5 and 6 at 19:00, three members each night, with an official stream featuring k4sen from 20:30.
Oct 5
Unitcom will sell a League The k4sen Official Original Design Pillarless Model under its LEVEL∞ gaming PC line from October 5, on a build-to-order basis starting at 279,800 yen. Buyers ordering a qualifying model between October 5 and December 11 at 14:59 receive an LTK Special Box, shipped separately from mid-November. Three example builds run from Core Ultra 5 to Ryzen 7 9800X3D with GeForce RTX 5070 Ti.
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."
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.