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§ Venture Capital · San Francisco, CA, USA
Corporate venture capital of Tokyo Gas. Funds early-stage startups in energy transition, decarbonization, and sustainability, bridging to Japan.
Key people at Acario.
Acario is a Menlo Park, California-based corporate venture capital and open innovation firm that invests in early-stage startups focused on the new energy economy, decarbonization, and sustainability. Operating as a wholly-owned subsidiary of Japanese utility giant Tokyo Gas, the firm provides capital and strategic support to bridge innovative North American and European climate technologies with the broader Asian energy market. The core investment thesis targets mobility, energy storage, grid modernization, artificial intelligence, and hydrogen infrastructure to support corporate net-zero emissions initiatives. The firm's active portfolio includes strategic investments in emerging companies such as Amperon, Heila Technologies, and Cleartrace, which recently secured a $29.8 million financing round. Acario also participated in a $105 million Series D funding round for hydrogen network developer FirstElement Fuel. The corporate venture organization was officially founded in 2017 by Tokyo Gas.
Key people at Acario.
Acario has 6 tracked investments across 5 companies. The latest tracked deal is $3.0M Seed in RockSolid Network in September 2025.
| Date | Company | Round | Lead Investor(s) | Co-Investor(s) |
|---|---|---|---|---|
| Sep 1, 2025 | RockSolid Network | $3.0M Seed | — | Airtree Ventures, Cadenza Capital Management, Castle Island Ventures, Founder Collective, Initialized Capital, Sharebear Capital |
| Feb 1, 2025 | Human | $7.0M Seed | — | 7percent Ventures, Founder Collective, Initialized Capital, LombardStreet Ventures, Sharebear Capital, Shkuri Ventures, Arash Ferdowsi |
| Oct 1, 2022 | Jetti Resources | $100.0M Series D | — | KittyHawk Ventures |
| Mar 1, 2022 | Grown As | $530K Seed | — | — |
| Jun 1, 2021 | Liatris | $1.0M Seed | Claire Broido Johnson, John Schveibinz | Propel(x) |
| Jul 1, 2017 | Jetti Resources | $18.0M Series A | — | KittyHawk Ventures |
Acario Innovation is the corporate venture capital and open innovation arm of Tokyo Gas, founded in 2017 and based in Silicon Valley. Its mission is to fuel innovation and investment in startups focused on the new energy economy and sustainability sectors, including mobility, energy storage, carbon capture, electrification, and next-generation energy services. Acario aims to create open innovation and accelerate the digital transformation of the energy sector, supporting Tokyo Gas’s broader Compass 2030 strategy to decarbonize energy and heat industries. By partnering with market-leading companies and other investors, Acario helps startups scale their sustainable technologies, enter new markets, and achieve product-market fit, thereby impacting the startup ecosystem by fostering innovation in clean energy and sustainability[1][2][5].
Acario was established as a Silicon Valley-based subsidiary of Tokyo Gas to leverage the innovation ecosystem in the U.S. and globally. The name “Acario” derives from the Japanese word “Akari,” meaning “light,” symbolizing the company’s role in illuminating the next generation of energy solutions. The founding team includes CEO Kenji Maeda and other key partners who bring expertise in investment and energy innovation. Since its inception, Acario has evolved to focus on early-stage investments in sectors such as grid modernization (Grid 2.0), Industry 4.0, decarbonization technologies, and energy-as-a-service (EaaS). Its portfolio includes startups advancing AI-powered energy forecasting, carbon capture, and renewable fuels, reflecting pivotal moments where technology meets sustainability challenges[1][3][4].
Acario rides the global trend toward decarbonization and the transition to a sustainable energy economy. The timing is critical as governments and industries accelerate efforts to reduce carbon emissions and modernize energy infrastructure. Market forces such as increasing demand for renewable energy, digital transformation of utilities, and regulatory pressures favor Acario’s investment focus. By supporting startups that develop scalable clean energy technologies and services, Acario influences the broader ecosystem by bridging innovation with established energy players, fostering collaboration, and accelerating the adoption of sustainable solutions[1][2][4].
Looking ahead, Acario is poised to deepen its impact by expanding investments in emerging energy technologies and digital services that enhance grid reliability, customer engagement, and carbon reduction. Trends such as AI/ML integration in energy management, electrification of transport, and energy-as-a-service models will shape its portfolio strategy. As global energy markets evolve, Acario’s role as a strategic investor and innovation catalyst will likely grow, helping Tokyo Gas and its partners lead the energy transition while enabling startups to scale internationally. This continued focus on sustainability and technology innovation ties back to Acario’s founding vision of illuminating the future of energy[1][2][4].