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 Solar Energy

Gosan Tech

Venture Round in 2025
Gosan Tech is a manufacturer and supplier specializing in displays, semiconductors, solar cells, and industrial inkjet printing systems. The company develops innovative inkjet printing technology aimed at enhancing pressure control devices and the precision of nano-ink products. This technology is applicable in various organic light-emitting diode (OLED) production processes, including the formation of organic material layers, encapsulation layers, and other critical components. By utilizing a multi-layer thin film stacked structure formation, Gosan Tech enables its clients to achieve improved results in their manufacturing processes.

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.

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.

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.

Girasol Energy

Seed Round in 2021
Founded in Tokyo, Japan in 2017, Girasol Energy develops an IoT platform for photovoltaic plants. It installs sensor networks, collects data at the panel level via its cloud engine, and uses AI to automatically detect anomalies. The company's exclusive technology leverages satellite-based solar radiation statistics, enabling it to offer services at a significantly lower price compared to competitors.

Girasol Energy

Series A in 2021
Founded in Tokyo, Japan in 2017, Girasol Energy develops an IoT platform for photovoltaic plants. It installs sensor networks, collects data at the panel level via its cloud engine, and uses AI to automatically detect anomalies. The company's exclusive technology leverages satellite-based solar radiation statistics, enabling it to offer services at a significantly lower price compared to competitors.

Material Concept

Corporate Round in 2016
Material Concept specializes in the manufacturing of copper paste designed for electrical components and solar panels. Its product offers comparable conductivity to silver at a significantly lower cost, making it an attractive alternative for industries seeking to reduce raw material expenses.

Solestial

Solestial develops radiation‑hardened silicon photovoltaic modules for space applications. Its ultra‑thin, flexible solar cells self‑repair radiation damage at normal operating temperatures, allowing panels to maintain performance for up to ten years in low Earth orbit. The modules are produced with automated manufacturing, reducing costs by about 90% compared to existing space‑grade technologies while enabling virtually unlimited production capacity. Solestial’s technology supports current satellite constellations, research missions, and future large‑scale space energy infrastructure, positioning the company as a key supplier for the emerging space economy.
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