Jiro Kumakura is a General Partner and Board Member at Global Brain Corporation, a Tokyo-based venture capital firm. See sector focus and contact routes.
Jiro Kumakura is a General Partner and Board Member at Global Brain Corporation, a Tokyo-based venture capital firm, where he joined in 2006 to lead corporate venture capital (CVC) fund formation and strategy while supporting portfolio startups in co-creating businesses. He focuses on investing in IT startups by leveraging his IPO experience and serves as the partner in charge of technologies. His investment focus spans artificial intelligence, physical AI, healthcare, and deep tech, primarily through CVC funds involving single limited partners from major Japanese corporations. While Global Brain generally invests at seed, early, and later stages across e-commerce, software, games, disruptive technology, education, entertainment, and fintech sectors, Kumakura’s specific check size and lead/follow behavior are not publicly detailed. He holds board positions at notable portfolio companies including Rainbow.dot, Wonderplanet, and RealGlobe. Kumakura’s distinctive background includes founding Digital Design as its CTO, where he developed communication middleware that achieved NASDAQ Japan’s first listing, and earlier system development work at CSK Corporation
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