Nijisanji VTuber Ittetsu Saeki (佐伯イッテツ) has carved out a distinct niche in the VTuber scene by pairing a low, “dandy” speaking voice with an unabashed love of early-2000s internet meme culture, according to a feature published by Real Sound Tech.
Saeki debuted on April 2, 2023, alongside three fellow members of the unit Oriens — Wen Akagi (赤城ウェン), Rito Usami (宇佐美リト), and Mana Higo (緋八マナ) — capping off their joint debut relay stream. Since then, he has become known among fans, fellow talents, and even senior and junior members of the agency for his voice, which listeners frequently describe as “ikevoice” (a Japanese term for an attractive speaking voice), often calling it simply “dandy.” Despite the deep, masculine tone, Saeki is described as highly emotionally expressive on stream, readily laughing, crying, and showing surprise — a gap between voice and personality that the report singles out as central to his appeal.
That same gap extends to his taste in content. The motto on Saeki’s X (formerly Twitter) profile is a quote from Hajime Saito (斎藤一), a character from the manga and anime “Rurouni Kenshin”: “aku soku zan,” meaning “evil must be cut down instantly.” His profile header mimics the cheap, colorful web design common in Japan from the late 1990s through the early 2000s, a period sometimes referred to as the early-to-mid Heisei era, and his YouTube channel description opens with the dated internet greeting “Yaa (´・ω・\`) youkoso” (“welcome”), followed by an unrelated running joke about a so-called “bourbon house.” According to the report, Saeki has said he was already active online as an elementary school student, which he credits for how naturally these references now come to him.
This sensibility carries into his content creation as well. Saeki reportedly designs most of his own stream thumbnails and video edits rather than relying solely on fan art, and the report notes his sense of humor shows there too — including thumbnails that are simply an unedited green-screen background, normally reserved for chroma-key editing, used as-is for impromptu streams.
The report points to his 3D debut stream, titled “3D First Play Part 1,” as the clearest showcase of this meme-heavy style, packed with references for viewers to spot.
Who is Ittetsu Saeki?
Ittetsu Saeki is a virtual YouTuber (VTuber) under Nijisanji, one of Japan’s largest VTuber agencies, which counts more than 150 talents under its umbrella. He debuted on April 2, 2023, as part of the four-member unit Oriens, alongside Wen Akagi, Rito Usami, and Mana Higo. Saeki is best known for his deep, “dandy” voice and his extensive knowledge of anime, manga, games, and early-2000s Japanese internet meme culture, which he weaves heavily into his streams, thumbnails, and video edits.
