Global Brain

Founded in Tokyo in 1998, Global Brain is a venture capital firm focusing on seed to late-stage investments across various sectors globally. They have invested in over 300 startups, facilitating 25 IPOs and 61 M&As through hands-on support services.

Kaori Akiba

Director

Hidetaka Aoki

Investment Group Partner and Fellow Chief of Space Lab

Tatsunori Arai

Director

Megumi Asatsuma

Director

Anjani Bansal

Partner / India Office Representative

Past deals in Energy

IONATE

Series A in 2025
IONATE develops smart transformer technology. Its Hybrid Intelligent Transformer (HIT) replaces traditional transformers, integrating real-time control of voltages and power distribution across grids, benefiting power generation facilities, industrial sites, data centers, and grid operators.

Beacon Power Services

Series A in 2024
Beacon Power Services, established in 2013 and headquartered in Lagos, Nigeria, specializes in designing and implementing energy management solutions for commercial and industrial facilities. The company's core offering is its AI-enabled grid management platform, Adora, which provides real-time visibility into network performance for electric utilities, enabling them to anticipate outages, identify network losses, and distribute electricity more efficiently. Additionally, Adora empowers consumers with control over their energy infrastructure, facilitating invoicing, installations, and logistics. Beacon Power Services aims to enhance the quality and duration of electricity supplied in African cities by building smart grids and leveraging data to reduce inefficiencies in power distribution systems.

EneCoat

Series C in 2024
EneCoat Technologies, established in 2018 and headquartered in Kyoto, Japan, specializes in the manufacturing and sale of perovskite solar cells and associated materials. The company focuses on developing and commercializing thin-film solar cell technologies, aiming to generate power even in low-light conditions. EneCoat's mission is to protect the environment and efficiently harness natural energy sources, enabling businesses to conveniently produce energy from solar cells.

Kyoto Fusioneering

Series C in 2024
Founded in Kyoto, Japan in 2019, Kyoto Fusioneering is a privately funded technology company focused on developing advanced technologies for commercial fusion reactors. Their work includes gyrotron systems, tritium fuel cycle technologies, and breeding blankets for tritium production and power generation. The company aims to accelerate the realization of fusion energy as a viable, carbon-free power source.

REDEX

Series A in 2023
REDEX is a blockchain-enabled platform that monitors and certifies the transfer and retirement of Renewable Energy Certificates (RECs). It provides services for managing RECs and offers a trading platform that accelerates and facilitates renewable energy procurement. The platform tracks ownership transfers and retirement, and uses a proof-of-stake mechanism to prevent double-counting. It enables businesses to browse listed RECs, select preferred assets, and submit offers to buy while validating commitments on a transparent blockchain ledger.

Caelux

Series A in 2023
Caelux is a renewable energy company based in Pasadena, California, founded in 2014. It specializes in developing and manufacturing perovskite-on-glass technology for the terrestrial solar and commercial space industries. This innovative technology is designed to enhance solar device efficiency while minimizing the amount of semiconducting material required, thereby reducing production costs. Caelux's products improve power production and integrate seamlessly into existing photovoltaic module manufacturing processes, allowing users to lower installed costs and boost overall performance.

Kyoto Fusioneering

Series C in 2023
Founded in Kyoto, Japan in 2019, Kyoto Fusioneering is a privately funded technology company focused on developing advanced technologies for commercial fusion reactors. Their work includes gyrotron systems, tritium fuel cycle technologies, and breeding blankets for tritium production and power generation. The company aims to accelerate the realization of fusion energy as a viable, carbon-free power source.

Yanekara

Venture Round in 2022
Yanekara is a technology company that specializes in smart grid solutions and electric vehicle (EV) charging infrastructure. The company has developed the V2X platform, which allows electric vehicles to function as virtual storage batteries, effectively utilizing them as a power storage system. This system is designed to optimize the energy generated from renewable sources, such as solar panels, by matching it with the charging needs of electric vehicles. Yanekara's offerings aim to facilitate energy management and promote carbon neutrality, enabling users to harness renewable energy more efficiently.

Clean Energy Connect

Series A in 2022
Clean Energy Connect Co., Ltd. is a Tokyo-based company established in 2020 that specializes in providing renewable energy solutions to corporate clients. The company focuses on generating and delivering green energy while investing in its own generation capacity to ensure a reliable electricity supply without environmental harm. Clean Energy Connect facilitates the transition to renewable energy by connecting distributed energy resources with customers interested in sustainable practices. It offers advisory services to optimize energy solutions, covering everything from implementation to operational methods, and providing cost-effective proposals that help clients seamlessly adopt renewable energy sources.

EneCoat

Series B in 2022
EneCoat Technologies, established in 2018 and headquartered in Kyoto, Japan, specializes in the manufacturing and sale of perovskite solar cells and associated materials. The company focuses on developing and commercializing thin-film solar cell technologies, aiming to generate power even in low-light conditions. EneCoat's mission is to protect the environment and efficiently harness natural energy sources, enabling businesses to conveniently produce energy from solar cells.

Kyoto Fusioneering

Series B in 2022
Founded in Kyoto, Japan in 2019, Kyoto Fusioneering is a privately funded technology company focused on developing advanced technologies for commercial fusion reactors. Their work includes gyrotron systems, tritium fuel cycle technologies, and breeding blankets for tritium production and power generation. The company aims to accelerate the realization of fusion energy as a viable, carbon-free power source.

Enlighted

Series C in 2017
Enlighted develops and supplies integrated lighting and environmental control solutions for commercial buildings. Its sensor platform collects occupancy, ambient light, temperature, and energy usage data, which is aggregated by the Gateway and visualized through the Energy Manager web interface. The company also offers a wall‑mounted Room Control device that lets occupants adjust lighting levels and configurations. Enlighted’s analytics help clients reduce energy consumption—often by up to 70%—while improving workspace comfort and operational efficiency. Since its founding in 2009, the company has installed sensors in more than 70,000 square feet of Fortune 1000 premises, including AT&T and Oracle. Enlighted is headquartered in Sunnyvale and operates as a subsidiary of Siemens Industry.

NBT

Series D in 2015
NBT specializes in the development of wind farms in the field of renewable energy in emerging markets.

Ossia

Venture Round in 2015
Ossia develops wireless charging technology, Cota, which safely delivers remote power to devices at a distance. Its patented smart antenna technology enables multiple devices to be charged simultaneously without user intervention, creating an efficient and wire-free environment.
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