Equity for the industries being rebuilt.
Starstone Ventures is a New York-based investment firm founded by two partners with more than fifteen years each in equity investment. We back the companies changing how physical industries work, from early stage to late stage private investment rounds.
Two partners, five sectors, and a high-conviction, concentrated portfolio. We participate, take board seats, and commit capital across every stage that follows.
Our background spans both sides of the table—as advisers structuring complex transactions at global institutions, and as principals deploying capital and managing assets through full market cycles. This experience ensures our portfolio companies scale smoothly without stalling when diligence, governance, and institutional reporting become critical.
We invest with sharp focus and deep involvement. We hold for the long term and maintain absolute candor with founders about where we add value. Our work begins at the first institutional round and intensifies as the challenges grow more complex—acting as active, hands-on partners who build alongside our teams for the long haul.
Where we invest
Five sectors we have worked in directly, and where we can judge the risk that actually matters.
AI
Proprietary AI — models, and the data and distribution that make them defensible — and physical AI: robotics, autonomy and perception systems that move atoms rather than only data. We look for teams shipping into real operating environments.
Climate technology
Decarbonisation of power, heavy industry and the grid. Technologies that have cleared the science risk and now face the harder question of reaching commercial scale.
Healthcare
Diagnostics, devices and care delivery, with a bias toward businesses whose economics improve as they reach more patients rather than degrade.
Financial technology
Payments, capital markets infrastructure and risk tooling built to institutional standards. We know what the buyers on the other side of these products actually need.
Infrastructure
Energy, transport and digital infrastructure, and the companies that develop, build and operate it — where demand is contracted and the returns are underwritten by real assets.
The partners
You will work with both of us, on every investment we make.
Hideyuki Gojima
Hideyuki brings over fifteen years of equity investment and operational expertise to Starstone, focusing on the firm's work across AI, healthcare, and infrastructure. He began his career at Deloitte and Goldman Sachs before founding and running multiple companies—giving him firsthand experience in what it takes to scale a business from the ground up.
As a partner, Hideyuki is the primary sounding board for founders on commercial strategy, pricing models, and building out initial institutional processes.
Junho Kang
Junho brings over fifteen years of multi-asset investing experience across public and private markets, focusing on Starstone's work in climate technology and financial technology. At Clearbrook and Hanwha, he spent years executing and managing investments across a wide spectrum of alternative asset classes—including energy, real estate, and industrial manufacturing.
His time at Clearbrook and Hanwha provided deep, hands-on experience in complex transaction structuring, capital allocation, and risk management across diverse market cycles. At Starstone, Junho leverages this institutional foundation to help founders optimize their capital structures, refine unit economics, and scale resilient platforms.