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 CleanTech

Creatura

Series A in 2025
Creatura assists companies in reducing greenhouse gas emissions by generating and distributing carbon credits and promoting the adoption of renewable energy sources.

Symbiobe

Series A in 2024
Symbiobe is engaged in the development of a resource-recycling material production platform that aims to promote sustainability through the effective utilization of underutilized natural biomass resources and photosynthetic organisms. The company focuses on creating alternatives for greenhouse gas fixation and producing industrial biopolymers, nitrogen fertilizers, and aquaculture feed. By advancing manufacturing processes that prioritize environmental sustainability, Symbiobe supports the transition to a more sustainable society and provides essential resources for environmental start-up businesses seeking natural and sustainable products.

Beleaf

Series A in 2024
Beleaf is an Indonesian hydroponic farm based in Bogor. It operates vertical farming systems using hydroponics to grow fresh greens and vegetables with minimal water usage, aiming to reduce its carbon footprint and provide consumers with locally sourced produce.

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.

Valpas

Seed Round in 2024
Valpas is a company focused on enhancing bed bug safety in the hospitality industry, providing innovative prevention systems that allow hotels to protect their guests and maintain a pest-free environment. Their technology features a bioengineered design that integrates a standard pitfall trap with wireless capabilities, effectively attracting, trapping, and detecting bed bugs while preventing infestations. By adopting Valpas systems, hotels can eliminate the need for harmful pesticides, reducing environmental impact and promoting guest safety. Valpas has garnered positive recognition from a growing number of highly-rated hotels worldwide, making it a trusted choice for both leisure and corporate travelers who prioritize safety in their accommodations. The Valpas label signifies a commitment to guest protection and sustainable practices in the hospitality sector.

Pale Blue

Series B in 2024
Pale Blue is a technology company focused on water-based propulsion systems and satellite mobility infrastructure for the aerospace industry. It designs and manufactures thrusters for microsatellites, including water resistojet, water ion, and hybrid propulsion devices. The propulsion systems use water instead of hazardous propellants like hydrazine, supporting sustainable space operations and in-orbit maneuvers for small satellites. The company was founded in 2020 and is based in Kashiwa, Japan.

Essen

Seed Round in 2024
Essen is a technological company that specializes in mobility and data analysis, as well as using data to improve transportation.

Vizcab

Series A in 2024
Vizcab is a company based in Lyon, France, specializing in the development of software solutions aimed at addressing low-carbon challenges in the construction industry. It offers a data-driven platform that facilitates the design of low-carbon buildings by enabling users to import 3D models from digital mock-ups and create a comprehensive database of architectural and technical alternatives. The platform employs data visualization techniques to explore design options, fostering creativity and informed decision-making among designers and builders. In addition to its software offerings, Vizcab provides consultancy services and conducts research projects with leading industrialists and designers, focusing on environmental assessment, energy efficiency, and the integration of big data into building practices.

Newmo

Seed Round in 2024
Newmo is a technology company that specializes in sustainable local public transportation. It develops a ride-sharing service platform, enabling drivers to work flexibly using their free time, and providing passengers with a safe, secure, and comfortable user experience.

Chemix

Series A in 2024
Chemix offers high-performance batteries custom-designed for specific EV market segments including e-motorcycles, sports cars, long-range premium EVs, and more. Chemix achieves this through a purpose-built AI-based battery design platform, MIX, coupled with a vast amount of in-house collected data, accelerating the battery development process by 5-10x while enabling the widest range of potential chemistries. Currently shipping and in production, the company's batteries are up to 30% better than state-of-art technologies and are based on sustainable chemistries that contain low to no cobalt as well as zero nickel elements.

CleanFiber

Venture Round in 2024
CleanFiber, LLC is a manufacturer of cellulose insulation materials designed for use in attics, walls, and floors of both residential and commercial buildings. Founded in 2013 and headquartered in Blasdell, New York, with an additional office in Buffalo, the company specializes in producing high-performance, carbon-negative insulation from recycled corrugated cardboard. This innovative approach not only promotes sustainability but also enables construction companies to build fire-resistant structures while maintaining cost competitiveness. CleanFiber has transitioned from its former name, UltraCell Insulation, LLC, in September 2018, and is currently focused on rapidly scaling up production to meet growing demand in the insulation market.

Windfall Bio

Series A in 2024
Windfall Bio is an innovative company based in San Mateo, California, that addresses climate change by transforming harmful methane emissions into organic fertilizer. Established in 2022, the company utilizes methane-eating microbes to capture methane from various sources, including agriculture, oil and gas, and waste management. This nature-based technology not only reduces the methane footprint of these industries but also improves their operational efficiency and profitability while minimizing the negative environmental impacts associated with synthetic fertilizers. By providing farmers and other producers with the means to convert methane into valuable soil nutrients, Windfall Bio fosters a sustainable agricultural future and contributes positively to environmental conservation. The company is backed by prominent venture capital firms, reflecting its potential to make a significant impact in the fight against climate change.

Ac-Planta

Series A in 2024
Ac-Planta researches, develops, manufactures, and sells biostimulants and agrochemicals based on acetic acid that enhance plant tolerance to heat, drought, and salinity. The company's product Skeepon is designed to promote plant adaptability to harsh conditions across turf, agriculture, and home gardens. Ac-Planta seeks to leverage advances in plant epigenetics to improve crop resilience and performance, supporting higher yields and quality while helping mitigate desertification. The firm serves agricultural and turf markets with a focus on climate-related stress, aiming to provide sustainable solutions for growers. Founded in 2018, the company is based in Bunkyo, Japan.

Super Studio

Series C in 2023
Super Studio specializes in providing Software as a Service (SaaS) solutions that enhance the efficiency of eco-friendly operations, sales processes, and customer experiences. They offer consulting services focused on product planning, development, manufacturing, sales promotion, supply chain optimization, customer relationship management, and enterprise collaboration platforms.

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.

HydroLeap

Series A in 2023
HydroLeap develops wastewater treatment technology that replaces expensive chemical treatments with smart electrical processes. The solutions address high-suspended solids, oil, and heavy metal-contaminated wastewater, enabling water recycling through electrical and membrane treatment systems and emphasizing environmentally friendly approaches.

Pionix

Seed Round in 2023
Pionix develops EVerest, a comprehensive open-source software platform for electric vehicle (EV) charging stations. The company offers integration services, cloud operations, and productivity enhancements through subscription-based models.

Connect Earth

Seed Round in 2023
Founded in 2021, Connect Earth is a London-based environmental data company that democratizes access to sustainability data. It offers a carbon tracking API technology to empower individuals and institutions to make sustainable choices by providing transparent insights into the climate impact of daily spending.

Regent

Venture Round in 2023
Regent designs and manufactures electric flying machines, known as seagliders, for coastal transportation. These wing-in-ground-effect craft operate a few meters above water's surface, combining airplane speed with boat operating costs. Seagliders aim to revolutionize regional travel by connecting coastal cities and islands efficiently and sustainably.

Cierpa & Company

Venture Round in 2023
Cierpa & Company develops environmental, social, and governance ESG management software. The cloud-based platform centralizes ESG information, enables cross-department information sharing, and optimizes workflows. It analyzes data to improve ESG scores and supports the collection, analysis, and disclosure of sustainability information for transparent management.

CleanFiber

Series B in 2023
CleanFiber, LLC is a manufacturer of cellulose insulation materials designed for use in attics, walls, and floors of both residential and commercial buildings. Founded in 2013 and headquartered in Blasdell, New York, with an additional office in Buffalo, the company specializes in producing high-performance, carbon-negative insulation from recycled corrugated cardboard. This innovative approach not only promotes sustainability but also enables construction companies to build fire-resistant structures while maintaining cost competitiveness. CleanFiber has transitioned from its former name, UltraCell Insulation, LLC, in September 2018, and is currently focused on rapidly scaling up production to meet growing demand in the insulation market.

U-Map

Series B in 2022
U-MaP Co., Ltd. is a manufacturer based in Nagoya, Japan, specializing in aluminum nitride (AlN) whiskers designed for thermal management and heat dissipation applications. Established in 2016, the company originates from research initiatives at Nagoya University and focuses on commercializing advanced materials and processing technologies. U-MaP is committed to addressing global challenges in manufacturing by developing conductive materials with high thermal conductivity and insulating properties. This innovative approach aims to enhance product quality and sustainability across various industries, positioning U-MaP as a key player in the development of next-generation industrial materials.

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.

AmicaTerra

Series C in 2022
AmicaTerra is a supplier and manufacturer of biomass products aimed at addressing environmental pollution. The company specializes in creating plant-derived, biodegradable fiber ceramic products, including tableware and straws. These items are designed to decompose naturally without releasing toxic chemicals, providing consumers with eco-friendly alternatives to traditional plastic cutlery. By focusing on sustainability, AmicaTerra contributes to reducing waste and promoting a healthier environment.

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.

Super Studio

Series C in 2022
Super Studio specializes in providing Software as a Service (SaaS) solutions that enhance the efficiency of eco-friendly operations, sales processes, and customer experiences. They offer consulting services focused on product planning, development, manufacturing, sales promotion, supply chain optimization, customer relationship management, and enterprise collaboration platforms.

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.

Ac-Planta

Venture Round in 2022
Ac-Planta researches, develops, manufactures, and sells biostimulants and agrochemicals based on acetic acid that enhance plant tolerance to heat, drought, and salinity. The company's product Skeepon is designed to promote plant adaptability to harsh conditions across turf, agriculture, and home gardens. Ac-Planta seeks to leverage advances in plant epigenetics to improve crop resilience and performance, supporting higher yields and quality while helping mitigate desertification. The firm serves agricultural and turf markets with a focus on climate-related stress, aiming to provide sustainable solutions for growers. Founded in 2018, the company is based in Bunkyo, Japan.

Pale Blue

Series A in 2021
Pale Blue is a technology company focused on water-based propulsion systems and satellite mobility infrastructure for the aerospace industry. It designs and manufactures thrusters for microsatellites, including water resistojet, water ion, and hybrid propulsion devices. The propulsion systems use water instead of hazardous propellants like hydrazine, supporting sustainable space operations and in-orbit maneuvers for small satellites. The company was founded in 2020 and is based in Kashiwa, Japan.

Lime

Series C in 2019
Lime operates a smart mobility fleet comprising electric scooters and pedal bikes, aiming to provide sustainable first- and last-mile transportation solutions. The company partners with cities worldwide to offer affordable, convenient, and eco-friendly travel alternatives.

Fermenstation

Venture Round in 2018
Founded in Iwate Prefecture, Japan in 2009, Fermenstation specializes in consultation services for utilizing unused biomass and ethanol production. The company offers feasibility studies, co-development projects, and brand consulting services, along with manufacturing rice-based home ethanol, Komesshu air freshener, and Oshu soap.

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.

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.

NBT

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

Awair

Seed Round in 2015
Awair is a technology company that develops indoor air quality monitoring devices and a software platform that provides actionable insights to improve indoor environments. Its sensors measure temperature, humidity, CO2, volatile organic compounds, and particulate matter, delivering real‑time data to homeowners, schools, and workplaces. The platform aggregates the data, offers recommendations, and helps users reduce exposure to pollutants, thereby supporting health and cognitive performance. Awair is headquartered in San Francisco and has an additional office in Seoul.
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