rYojbaba

rYojbaba

Hisashi Katsuya founded rYojbaba in 2016, drawing on his operational experience at KDDI where he contributed to the carrier's payments and digital wallet infrastructure. The firm emerged as an independent venture outfit investing personal capital, initially structured around Katsuya's conviction that Japan's startup ecosystem lacked operator-led early-stage funds. rYojbaba's identity is tied to its founding premise: back technical founders building infrastructure, enterprise software, and fintech products, often before institutional venture firms have scaled into the opportunity. The firm concentrates on pre-seed and seed rounds, writing initial checks typically in the range of ¥10 million to ¥50 million with reserves for follow-on participation through Series A. rYojbaba's portfolio spans enterprise SaaS, developer tools, fintech, and digital health, with public record showing investments in Japanese startups including SmartHR (SaaS HR platform) and WealthNavi (robo-advisory fintech), alongside exposure to Southeast Asian markets through a small number of cross-border seed deals. The firm participates almost exclusively in direct equity rounds and does not operate fund-of-fund or club-deal structures as a core activity. Katsuya maintains a lean organization, operating rYojbaba without disclosed additional offices or a formalized partnership group. The firm does not publish total deployment figures, and its capital base remains privately sourced. No adjacent philanthropic vehicles or multiclient structures have been disclosed. A September 2023 public filing confirmed the firm's continued activity through a seed-stage investment in a Tokyo-based AI-driven workflow automation startup, consistent with the mandate Katsuya established at founding (per public record, September 2023). The firm's investment cadence suggests a portfolio of roughly 30–40 active positions built over the past decade, though no verified count is publicly available. rYojbaba's structural differentiator lies in its independence from both institutional limited-partner capital and corporate venture mandates. Unlike most Japanese early-stage funds, which raise traditional LP vehicles or operate as corporate venture capital arms, rYojbaba deploys personal capital alongside a selective group of individual co-investors, allowing Katsuya to execute term sheets without investment committee delays. This architecture mimics the operating posture of a private office more than a conventional venture firm, giving rYojbaba unusual speed in competitive seed rounds where technical founders prioritize quick, founder-aligned capital.