Starlight Engine
Starlight Engine is a climate tech company in Tokyo, Japan, founded in 2025. It has raised $37.4M across 1 round, most recently a $37.4M Seed in July 2026.
POWERING the FUTURE
- Headquarters
- Tokyo, Tokyo
- Employees
- 1–10
- Founded
- 2025
- Business Model
- B2B
- Website
- sle.energy
- Total Funding
- $37.4M
- Last Round
- $37.4M SeedJul 2026
- Rounds
- 1
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 1 funding round and 2 investors for this company. The full record is or through the API.
About
Starlight Engine Ltd. (SLE) is a Japan-based fusion energy company established in April 2025 as a group company of Kyoto Fusioneering, tasked with leading the FAST (Fusion by Advanced Superconducting Tokamak) project. Guided by its mission 'Bringing fusion energy to the world,' SLE aims to integrate all critical technologies required for fusion power generation—including high-temperature superconducting coils, fuel breeding blankets, and energy conversion systems—into a unified power plant demonstration. The company targets commercial fusion power plant deployment in the 2030s, building a Japan-led global supply chain in collaboration with industry, government, and academia.
Summary
It lists 1–10 employees. It has raised $37.4M in total across 1 round, most recently a $37.4M Seed round in Jul 2026. Investors include Global Brain and TOHO Ventures.
Tech & App Stack
2 technologies & apps tracked
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Funding History
Jul 2026
Investors
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