Top 20 Clean Energy VC Funds & Investors in Japan (September 2026)

Portfolio highlights

• TWO — TWO is a health and wellness company that offers innovative lifestyle solutions 2foods, a line of healthy and delicious food products.
• ElleThermo — elleThermo aims to implement Semiconductor-Sensitised Thermal Cells (STCs), an energy conversion technology that can generate electricity from unused waste heat above room temperature.
• Advance Composite — Advance Composite is a manufacturing company that develops composite materials and molten metal forging-based products.

Portfolio highlights

• Alxtal — Alxtal is a tech company who optimize the development, design, and manufacturing processes of the manufacturing industry with IT and AI.
• Direava — Direava is a medical device company that manufactures, sells, leases, and maintains medical equipments along with consulting services.
• Zerodoor HD — Zerodoor HD specializes in digital transformation in constructing industry.

Portfolio highlights

• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas. It is a spin-off startup from the National Institute for Fusion Science (NIFS) in Japan that provides a fusion reactor based on the stellarator design, a magnetic confinement approach that enables inherently stable,continuous plasma operation.
• Surv Biopharma — Surv Biopharma develops a drug discovery platform that facilitates research and development of veterinary drugs and pharmaceutical products.
• Cardio Intelligence — Cardio Intelligence develops an AI automated diagnostic system.

Portfolio highlights

• REVORN — REVORN is a fragrance AI and DX research and development company. They develop products such as odor sensors that can respond to odor issues and needs. They provide consultation at a range of levels, from identifying issues to developing solutions.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas. It is a spin-off startup from the National Institute for Fusion Science (NIFS) in Japan that provides a fusion reactor based on the stellarator design, a magnetic confinement approach that enables inherently stable,continuous plasma operation.
• Illumi Medical — Illumi Medical is a manufacturing company that produces medical equipment and devices for the healthcare sector.

Portfolio highlights

• Anipos — Anipos is an application that allows you to easily claim pet insurance.
• IoTBASE — IoTBASE offers IoT cloud services.
• Blossom Energy — Developed advanced nuclear reactors that are able to produce clean energy, Blossom Energy manufactures nuclear reactors for the nuclear energy industry. The focus of the company is on providing affordable, stable, and sustainable energy for the world. The company utilizes HTGR, which is a fourth-generation nuclear reactor.

Portfolio highlights

• ATOMica — ATOMica is a co-working space and business management company for conference rooms, event venues, circles, and schools. The company uses coworking spaces as HUBs to provide services that maximize individuals' power. It can be used for a variety of purposes, including coworking space, shared office space, meetings, events, and web seminars. Itis also possible to use it only once. They plan and run local communities that bring together a diverse range of people, including students, workers, businesses, universities, and governments.
• Esree Energy — Esree Energy is a creator of thermal-based energy storage systems designed to effectively store and distribute electricity. The business stores excess energy as thermal differentials using compressed carbon dioxide and heat pump concepts.
• Blossom Energy — Developed advanced nuclear reactors that are able to produce clean energy, Blossom Energy manufactures nuclear reactors for the nuclear energy industry. The focus of the company is on providing affordable, stable, and sustainable energy for the world. The company utilizes HTGR, which is a fourth-generation nuclear reactor.

Portfolio highlights

• Kikuvi — Kikuvi develops an AI-driven interview agent that automates question design, execution, and analysis. It eliminates the effort of listening, allowing users to focus their time on decision-making and creativity.
• Mign — Mign offers a generative AI-related SaaS solutions for the construction and real estate fields.
• Cosmobloom — Cosmobloom Co. is a manufacturing company that analyses, designs, and develops space solar power generation systems and solar power sails.

Portfolio highlights

• NBT — NBT specializes in the development of wind farms in the field of renewable energy in emerging markets.
• Josys — Stop letting runaway SaaS costs & unsecured SaaS access ruin your day. Josys is the only SaaS Management Platform that provides true 360-degree control.
• Deeping Source — Real-time Video Analytics based on Data Anonymization. High-accuracy computer vision for large-scale spaces: hypermarkets, shopping malls, convention centers, hospitals, logistics warehouses, construction sites, etc.

Portfolio highlights

• CaTe — CaTe is based in Tokyo. CaTe develops and manufactures a Digital Therapeutic (DTx) for remote cardiac rehabilitation. Their invention allows heart disease patients to safely and successfully complete cardiac rehabilitation utilizing standing exercise in a confined space, such as at home, without the use of ergometers or similar instruments.
• bestat — bestat is a developer of platforms for 3D data creation, management, and utilization using AI and offers digital twins services.
• ElleThermo — elleThermo aims to implement Semiconductor-Sensitised Thermal Cells (STCs), an energy conversion technology that can generate electricity from unused waste heat above room temperature.

Portfolio highlights

• ElleThermo — elleThermo aims to implement Semiconductor-Sensitised Thermal Cells (STCs), an energy conversion technology that can generate electricity from unused waste heat above room temperature.
• Starlight Engine — Starlight Engine develops and commercializes fusion energy power plant technologies.
• Neusignal Therapeutics — Neusignal Therapeutics is a medical company that develops therapeutic medicines for dementia and psychiatric illnesses.

Portfolio highlights

• HANAMII — HANAMII is a creative and marketing company that offers digital marketing, branding, business support services, and social media marketing.
• Any Style — Any Style develops a messaging app from voice actors that regularly sends messages via subscription. It also engages in the planning and production of audio content and the VTuber production business.
• Arrowsmith — Arrowsmith is committed to unlocking the full potential of bacteriophages to revolutionize the treatment of bacterial infectious diseases. Through transformative science, Arrowsmith strive to create a world free from the pain and fear caused by antimicrobial resistance.

Portfolio highlights

• Quemix — Quemix is an IT company specializing in providing quantum computing solutions including quantum computers, quantum communication, and quantum sensors. Quemix conducts cutting-edge research in quantum mechanics and mathematical information science, as well as materials science and quantum chemistry. Quemix implements cutting-edge research resultsinto society by fusing them with existing IT and simulation technologies, opening up a world that conventional computers have never reached.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas. It is a spin-off startup from the National Institute for Fusion Science (NIFS) in Japan that provides a fusion reactor based on the stellarator design, a magnetic confinement approach that enables inherently stable,continuous plasma operation.

Portfolio highlights

• Craif — Icaria's mission is to create a new society in which people will not lose their lives by using urine tests to provide "early, painless and accurate early diagnosis of cancer."It is known that detecting cancer early increases the survival rate 5 to 10 times and greatly improves the prognosis. However, it is not unusual for manycancers to have no subjective symptoms, and when they become aware they have progressed to a stage where treatment is impossible. The most effective way to detect cancer at an early stage that can be treated is to have regular and high-precision cancer diagnosis, but existing cancer diagnosis is painful and However, many of them are not accurate enough and are not suitable for regular diagnosis and early stage diagnosis.
• Alpaca — Alpaca API allows developers and businesses to build apps, embed investing, and trade algorithms
• Snack Technologies — Snack Technologies specializes in the development and operation of “SnaTech,” an innovative business support application designed for snack bars, helping operators streamline daily management, improve customer engagement, optimize inventory and sales tracking, and enhance overall business efficiency through digital solutions tailored to the foodand hospitality industry.

Portfolio highlights

• EF Polymer — EF Polymer Private Limited providing 100% Organic and fully Biodegradable Super Absorbent Polymer cum Fertilizer to reduce Water and Fertilizer requirement for your plant. Let's grow organically.
• DigitalArchi — Realizing a revolution in architecture.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas. It is a spin-off startup from the National Institute for Fusion Science (NIFS) in Japan that provides a fusion reactor based on the stellarator design, a magnetic confinement approach that enables inherently stable,continuous plasma operation.

Portfolio highlights

• JIZAIE — JIZAIE is an artificial intelligence firm that wants to combine VR, robots, and wearable computing to create solution.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas. It is a spin-off startup from the National Institute for Fusion Science (NIFS) in Japan that provides a fusion reactor based on the stellarator design, a magnetic confinement approach that enables inherently stable,continuous plasma operation.
• Pixie Dust Technologies — Pixie Dust Technologies is a developer of computational technologies, including its ultrasonic phased array system with which one can generate force in mid-air; transport things in mid-air without touching anything; target and deliver different sounds from person to person in a crowd; direct guide-dogs; and even apply this in agricultural farming.

Portfolio highlights

• Terra Labo — Terra Labo conducts research and development on long-range unmanned aerial vehicles.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas. It is a spin-off startup from the National Institute for Fusion Science (NIFS) in Japan that provides a fusion reactor based on the stellarator design, a magnetic confinement approach that enables inherently stable,continuous plasma operation.

Portfolio highlights

• JaQool, Inc. — JaQool is a company that will leverage social innovation and new technologies to create convenient services that are something to get excited about. Three entrepreneurs from different backgrounds have gathered together to utilise these new technologies and techniques to develop services that can help to make the world a better place.JaQool willinitially work on a mobile translation service for tourists coming to Japan from overseas. The number of tourists from overseas has been increasing rapidly in recent years, but many have encountered difficulties due to being unable to understand Japanese. Removing the language barrier is a pressing challenge that needs to be addressed, particularly in preparation for the Tokyo Olympics that will be held in 2020. JaQool can help contribute towards a solution.
• Kotozna — Kotozna is an IT service company that aims to solve the social problem of "language cave" using cutting-edge technologies such as AI and machine translation. Multilingual translation services such as "Kotozna Chat", which provides messaging with simultaneous translation between different SNS platforms, and "KotoznaCamera", which translates Japanese content such as restaurant menus and displays them by QR code scanning.
• Blossom Energy — Developed advanced nuclear reactors that are able to produce clean energy, Blossom Energy manufactures nuclear reactors for the nuclear energy industry. The focus of the company is on providing affordable, stable, and sustainable energy for the world. The company utilizes HTGR, which is a fourth-generation nuclear reactor.

Portfolio highlights

• Opt Fit — Opt Fit is a fitness industry that provides fitness, wellness and health-care services.
• Gaxi — Gaxie is an IT firm that provides a cloud management system and manages scholarship sites for business.
• Factory X — Factory X is an information technology company that helps to increase value manufacturers with the inventory strategy model.

Portfolio highlights

• ADiXi — Adixi is a tech-driven business that supports the idea that people and technology may work together. It strives to open doors by utilizing cutting-edge technology, such as artificial intelligence, to promote long-term, sustainable corporate and societal progress.
• Caguuu — Caguuu offers high-quality designer furniture at affordable prices, through e-commerce, eliminating middlemen and store operating costs.
• Link Therapeutics — Link Therapeutics specializes in developing therapeutic methods for targeting autoantibodies and identifying pathogenic autoantibodies.

Portfolio highlights

• Akari Hosho — Akari Hosho provides a group of trusted professionals, including lawyers and judicial scriveners. Akari Hosho provides a guarantee service.
• Black Cat Carnival — Black Cat Carnival Inc. is a communication service development company.
• Carbon CryoCapture — Carbon CryoCapture specializes in the carbon dioxide separation systems aimed at creating economically viable, energy-efficient, and genuinely sustainable CO2 separation and recovery technologies. The company is dedicated to deploying cost-effective, efficient systems for CO2 capture that integrate smoothly with current infrastructures, all whileenhancing energy consumption and production. This enables clients to attain zero emissions throughout the development and application of resources.