Top 25 Clean Energy Startup Investors in Japan (June 2026)

Portfolio highlights

• LQUOM — QWAVE offers cryptography communication technology.
• Captain Fresh — Captain Fresh is a freshwater fish and seafood supply chain platform. Captain Fresh is a B2B marketplace leveraging technology to deliver the fastest harvest-to-retail in the industry. The company focuses on aggregating the fragmented retail demand across the country and linking them to the small fishermen and farmers throughout the Indian coast.The company was founded in 2019 and is based in Bengaluru, India.
• Sonire Therapeutics — Sonire Therapeutics provides High-Intensity Focused Ultrasound treatment for cancer.

Portfolio highlights

• Argos — Argos provides the online insurance medical treatment service.
• Brainbuddy — Brainbuddy specializes in sales support, business growth, recruiting, consulting, and training services.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

Portfolio highlights

• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

Portfolio highlights

• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

Portfolio highlights

• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

Portfolio highlights

• FLATBOYS — FLATBOYS specializes in planning, development and operation of internet business.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

Portfolio highlights

• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

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.

Portfolio highlights

• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.
• 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

• BitStar — BitStar accelerates potential of video creators with power of proprietary database and technology.
• Beatrust — Tags connect and drive collaboration, expanding your team's potential
• Base Food — Base Food produces high-quality, flavorful staple food products that are nutritionally-balanced and convenient.

Portfolio highlights

• Logiless — Logiless is a cloud type all-in-one software dedicated to net shop. Since both orders and stocks can be managed together in a logical manner, efficiency of operations can be realized at low cost.
• LUC — LUC is a provider of the AI ​​x experience analysis platform "TERUS," .
• Turing — Turing develops and manufactures fully autonomous vehicles.

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.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

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.
• Turing — Turing develops and manufactures fully autonomous vehicles.
• Reiwa Travel — Reiwa Trave is a digital travel agency intended that optimizes overseas travel. The company's platform uses online travel booking tools that provide digitalized contracts along with trip management, thereby enabling its customers' vacation and leisure experiences.

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

• 3S — 3S is a SaaS developer platform that provides and operates 24-hour home nursing care services through technology.
• Pragtech — Pragtech develops and operates parking lot service software that helps to eliminate payment congestion and reduce operating costs.
• Knowledge Work — Knowledge Work specializes in the development and sales of software for companies.

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

• Kollektion — KLKTN is a curated music, manga and art NFT platform connecting creators with fans through special experiences. The platform allows fans to access special edition digital art and behind-the-scenes moments of artists' creative process. In collaboration with top creators and artists and powered by blockchain technology, KLKTN is takingartist-fan engagement and the best of creative experiential culture into the digital world. Artworks are available as a limited supply of authenticated digital products or NFTs, for purchase via credit card, with a fixed cost per item. KLKTN's co-founders are Jeff Miyahara, Chief Creative Officer and a renowned record producer and songwriter who has produced over 260 international artists; Fabiano Soriani, Chief Technology Officer and former lead blockchain engineer for Dapper Labs; and Daisuke Iwase, Chief Executive Officer, Harvard Business School graduate, former World Economic Forum Young Global Leader, and a digital pioneer known for co-founding Lifenet, a disruptive fintech venture, which he took to IPO. Built on the Flow blockchain to achieve affordable and environmentally-sustainable minting, KLKTN leaves more for artists, fans, and the planet.
• Sustech — Sustech is a technology company that develops platforms for decarbonization support and distributed power generation services.
• Ispace Technologies — ispace is a private lunar robotic exploration company that is developing micro-robotic technology to provide a low-cost and frequent transportation service to and on the Moon, conduct lunar surface exploration to map, process and deliver resources to our customers in cislunar space.

Portfolio highlights

• Paytner — yup is providing services to support freelance people's funding.The freelance population in Japan has been shown to continue to increase in many Chosa. While working styles are diversified, they are not able to respond to the development of the working environment, and they will develop their business to change the situation where problemssuch as funding, credit, sexual harassment, and power harassment are accumulated.
• 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

• Cosomil — Cosomil develops early diagnostic drugs for diseases and provides research and development support to healthcare companies.
• RemitAid — RemitAid is a fintech company that operates an overseas payment platform for cross-border transactions between companies.
• Takumi Giken Kogyo — Takumi Giken Kogyo is a price technology developer to help parts manufacturers quickly identify acceptable product prices. Takumi Giken Kogyo assists in estimate calculation and product function through AI drawing search and repeat project determination function, enabling manufacturers with flexible customization of product functions based oncustomer requirements.

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

• THE RICH — THE RICH is a hair care brand that contains silk regenerating and repairing ingredients.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.
• One World Technology —

Portfolio highlights

• Quemix — Quemix is an IT company specialized in providing quantum computing solutions.
• Helical Fusion — Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

Portfolio highlights

• Diggle — DIGGLE is a service that provides fundamental management accounting management on the cloud called fraud management. It is possible to reduce the mistakes and man-hours of the fraud management task and easily carry out the fraud management task even if it is not an expert in finance or accounting.DIGGLE covers budget creation work and budgetrecord comparison work, especially in the foreman management work. In the budget creation work, the KPI and the budget are automatically created by inputting the target numerical value to the preset parameters utilizing the budget generator function, while the forecast contrasting work is made up of the financial information, non-financial information It is easy to calculate by simply entering the numerical value, and it is possible to carry out calculation of the forecast contrast.
• Fermelanta — Fermelanta produces rare plant-based ingredients through microbial fermentation. It engineers a cell to build a biosynthetic pathway of target molecules with gene transfer and disruption.
• Japan Culture and Technology — Japan Culture and Technology assists artists and craftspeople in expanding their activities by providing IT support.

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.
• Aeterlink — Aeterlink is a wireless device maker and developer. They applied their technology to fields such as FA, robots, smart houses, and medicine and developed practical level technologies such as elemental technology that can wirelessly supply power.
• Metagen Therapeutics — Metagen Therapeutics is a Drug discovery and medical business company which utilizes microbiome science.

Portfolio highlights

• Beff — Beff is a company that focuses on Global AI and battery development. It intends to reduce material waste and CO2 emissions during battery production and secure resources in a sustainable manner.
• Fager — Fager is an agriculture firm specializing in promoting decarbonization projects, agricultural carbon production, and sales.
• Nature — Nature offers a product that enables its users to save money by controlling the use of their air conditioners.The product that the company offers is an air conditioner controller that transforms any window-mounted or through-wall AC into a smart one, equipped with infrared, power control, and sensors that, along with a mobile app for voicesensors, enabling users to operate household appliances with just one smartphone to control their ACs. It transforms the operation of room air conditioners (ACs) to improve comfort and efficiency for consumers while reducing energy demand peaks for utilities with simple, inexpensive, and easy-to-install device.The Boston, Massachusetts-based company was incorporated by Mash Ohtsuka and Haruumi Shiode in 2014.