Korean fusion startup TerraFusion raises $1.5M seed for continuous-run reactor tech
What's the deal? TerraFusionDealroom has a profile for this one. Try Dealroom →, a South Korean nuclear fusion startup, has raised 2.3 billion KRW (about $1.5 million) in a seed round. The round drew Company K PartnersDealroom has a profile for this one. Try Dealroom →, Bluepoint PartnersDealroom has a profile for this one. Try Dealroom →, and Seoul Techno HoldingsDealroom has a profile for this one. Try Dealroom →; per-investor amounts and the company's valuation were not disclosed.
What's the endgame? The company is developing a current-drive technology called Tokamak Injection, which continuously supplies plasma current from outside the reactor. It aims to build a compact, modular fusion reactor (COSMOS) that runs 24 hours a day — solving the continuous-operation problem that has limited conventional fusion designs.
The seed capital will fund proof of concept for Tokamak Injection and early validation of core technology. The founding team comes from Seoul National University's VEST lab, which has developed and operated Korea's only spherical tokamak experimental device since 2011.
Why now? Power demand is rising fast on the back of AI data centres, chip fabs, and electric vehicles, sharpening interest in stable, carbon-free electricity. Fusion is shifting from state-led megaprojects toward private startup competition, with Korea's Ministry of Science and ICT pushing to build a commercialisation ecosystem around private firms.
The context: The round is a rare hardtech seed deal in Korea's early-stage private fusion scene. Overseas leaders such as Commonwealth Fusion Systems and Helion Energy have pulled in rounds worth trillions of won, and global fusion startups drew $2.2 billion in fresh private money through July 2025 alone.
"형융합 발전은 단기간의 시장성보다 장기적인 기술 주권과 에너지 안보 관점에서 접근해야 하는 대표적인 딥사이언스 분야," said Nam Gi-min, principal at Bluepoint. He said TerraFusion was backed for tackling continuous operation head-on, drawing on Korea's only spherical tokamak experience.
What's the endgame for the founder? Chief executive officer Kim Tae-kyung said the funding would let the team validate core technology early and speed development toward commercialising fusion energy in the 2030s.
The signal: This is a small cheque by global fusion standards, but it marks Korean VCs and accelerators starting to fund long-horizon fusion R&D. Bluepoint held a dedicated fusion forum stressing 10-to-20-year milestone investing — and this deal, backing one of the players it profiled, reads as a starting point for Korea's fusion investment story rather than a one-off.
Read more: WowTale
Image credit: Generated with Gemini
