Top 15 CleanTech Startup Investors in Japan (June 2026)

Portfolio highlights

• Nealle — Nealle offers business development, business planning and consulting services.
• QibiTech — QibiTech created HATS, a service in which a human operator remotely supplements the operation of a robot. Add-on edge calculator or software for various robots to increase robot flexibility. It also serves as a platform for connecting operation data to the business improvement system.
• SPACECOOL — Spacecool offers zero-energy cooling materials that radiate heat to space, reducing temperatures and mitigating global warming.

Portfolio highlights

• PXP — PXP is a green tech development firm that develops clean energy using next-generation photoelectric conversion elements.
• SPACECOOL — Spacecool offers zero-energy cooling materials that radiate heat to space, reducing temperatures and mitigating global warming.
• Clean Energy Connect — Clean Energy Connect is into offering green energy solutions. It invests in its own generation capacity for a stable electricity supply by not harming nature.

Portfolio highlights

• Raena — RAENA adalah platform reseller kecantikan terbesar di Indonesia yang memberikan peluang bisnis rumahan yang menjanjikan. Dropshipper & Reseller produk kecantikan
• Ralali — Ralali.com, Pusat toko grosir online pertama di Indonesia, sebagai b2b wholesale marketplace platform yang menghubungkan supplier, distributor dengan retail.
• Delivered Korea — Delivered Korea is an e-commerce platform, that accelerates cross-border e-commerce from South Korea to your country.

Portfolio highlights

• Anipos — Anipos is an application that allows you to easily claim pet insurance.
• HANOWA — HANAWA is a matching platform between freelance dental hygienists and dental clinics.
• 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

• 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

• Favolist5 — Favolist5 is a software company that develops an abbreviated voice SNS based on web3 for personal media.
• Smartround — Smartround is a specialized finance management platform for startups and their investors. For start-ups, for entrepreneurs who are not familiar with finance, simply enter the necessary information according to the guide, prepare appropriate financing round, and prepare a function that can simulate and execute a capital increase. Support informationsharing and communication with shareholders even after the capital increase.
• AnotherBall — AnotherBall is a blockchain startup that combines entertainment and blockchain.

Portfolio highlights

• Koloma — Koloma is revolutionizing clean energy by harnessing naturally occurring hydrogen from deep within the Earth.
• Enechain — enechain provides liquidity in Japan’s energy market by brokering OTC transactions of energy.
• SPACECOOL — Spacecool offers zero-energy cooling materials that radiate heat to space, reducing temperatures and mitigating global warming.

Portfolio highlights

• Femtum — Femtum offers mid-infrared pulsed fibre lasers, fibre amplifiers, and tunable fibre lasers for medical and industrial use. They give access to mid-infrared spectroscopy with laser systems. Their team developed know-how and patented technologies to make a difference in the laser industry.
• Pinc Technologies — PINC's nanoPPLN platform brings nonlinear circuits to integrated photonics, unlocking breakthroughs in sensing, computing, communications, and beyond.
• BEAM Technologies — BEAM Technologies, focuses on developing optical semiconductor devices using special light to offer clean solutions to ecosystem-related problems.

Portfolio highlights

• 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

• ULUU — ULUU is an ocean material that replaces plastic and actively benefits the world.
• Aquaria — Aquaria provides solutions to secure access to clean water. The organization adapts its approaches based on the needs of these communities. It addresses water-related challenges through various methods.
• Funderbeam — Funderbeam is a funding and trading platform that connects companies and investors to buy and sell equity stakes. The platform allows the founders to gain exposure, legal support, a funding manager, or an investor network. It also allows the investors to take control of their investments and trade anytime they want.The company was founded in 2013as a global data platform for startup companies.

Portfolio highlights

• nat — nat develops iOS application - Scanat and provides consultation service in data strategy.
• Ascenders — Ascenders is a sports human resources business platform.
• Chitose Group — CHITOSE GROUP is a family of biotechnology companies operating mainly in Southeast Asia and Japan with an aim of leaving mankind with an environment where they can live in abundance for over a thousand years. CHITOSE GROUP is creating new values in the fields of agriculture, medical, food, energy, chemistry and others through “Technologicaldevelopment capabilities in the biotechnology field by constantly promoting economic rationality” and “Business development capabilities for drawing a path towards commercialization by understanding the essence and limitations of biotechnology”.

Portfolio highlights

• Letara — Letara operates a space technology platform with the intention to serve a logistics network covering the solar system. The company produces hybrid propulsion engines for small spacecraft, promoting groundbreaking advances in space propulsion with high thrust, safe, and inexpensive propulsion system technology.
• 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.

Portfolio highlights

• Ichirou — Ichirou provides digital senior care support services to connect elderly people with caretakers. It offers caretaker services for different types of support, including housework, hospital care, nursing, hospital and doctor visits, and shopping assistance.
• Visual Bank — Visual Bank operates a stock photo business and provides an AI data platform. It aims to create a society in which the value of Japanese creations is maximized and optimized.
• Rocket Link Technology — Rocket Link Technology is a product development company that specializes in designing LTP rockets for space travel.

Portfolio highlights

• Energy Trade — Energy Trade is a energy & power wholesaler that procures and provides wholesale power services for retail electric power companies.

Portfolio highlights

• Landsview — Landsview is an IT company that provides software development, numerical analysis, testing equipment, and measurement services.
• Flora — Flora develops a big data platform for female health, collecting data on individual symptoms, work performance, health conditions etc.
• Izanagi Games — Izanagi Games is an entertainment company that focuses on producing and publishing interactive games.