Top 50 Sustainability Angel Investors in Japan (August 2026)

Portfolio highlights

• Carstay — Carstay Comfortable Overnight in car or tentdo itCar tripWith guests who want to enjoy.

Portfolio highlights

• Zeigo — Zeigo by Schneider Electric provides sustainability software for efficient carbon reduction and supply chain decarbonization, aiming for a carbon-free future.
• RootWave — RootWave is an electronics company that develops tools that kill weeds it enables farmers to control weeds on their farm. Its technology is an alternative substitute for herbicides and other weed control chemicals. The company was founded in 2012 and headquartered in Warwickshire, United Kingdom.
• Sniffer Robotics — Comprehensive methane emissions detection and quantification, advanced imagery and analytics; Sniffer Robotics provides advanced solutions that benefit the environment.

Portfolio highlights

• Voicy — Voicy is a mobile platform that recruits both media personalities and news organizations, the entertainers read the news so users can get the latest info from favorite voices. As it enters the age of IoT, interfaces have begun to evolve into seamless forms, such as AR, that allow to access information without stopping daily lives, but in this era,it has focused on the ear.
• Carstay — Carstay Comfortable Overnight in car or tentdo itCar tripWith guests who want to enjoy.
• Telework — Telework is a multi-location workspace that utilizes vacant seats and rooms.

Portfolio highlights

• Gab — Gab is a company that works to solve social problems as well as develops and markets ethical products.

Portfolio highlights

• RABO — RABO is a Cat-Tech Company that "watches cat life with technology.
• nanoFreaks — nanoFreaks builds a rescue system on the sea, creating an environment where everyone can live with peace of mind.

Portfolio highlights

• MI-6 — MI-6 is a research, development, consulting, and project management for material development using IT. We will promote materials informatics in the field of material development with our technological capabilities and a wealth of project knowledge that challenge the world's most advanced technologies .
• ELESTYLE — ELESTYLE are promoting mobile payments and providing high value-added services for users to realize a cashless society.
• Luup — Luup is Japan's #1 e-scooter and e-bike sharing service provider. Luup currently operates in Tokyo, Osaka, Kyoto, and Yokohama, while planning to expand to other cities all over Japan. The service is based on a high-density port network, where anyone can rent and return to their original fleets.

Portfolio highlights

• Pleap — Pleap is a medical engineering company specializing in the development of AI and IoT-based technology solutions tailored for medical institutions. The company's product offerings include "medimo" which is an AI tool that automatically creates medical record manuscripts from medical audio.
• Terrafarm — Terrafarm is a Tokyo-based agritech and aerospace start-up that develops fully automated, space-ready plant factory modules designed to operate in extreme environments.
• Conoris Technologies — Conoris Technologies is a staffing agency that offers security check support services for companies.

Portfolio highlights

• Ecbo cloak — Ecbo cloak is a sharing service that connects "persons who want to store luggage with shops with space to store luggage. Instead of coin lockers, you can pre-order places online online and store your luggage in the open space of stores of various types of business.

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. 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.
• One World Technology — One World Technology Co., Ltd. blends traditional Japanese culture with advanced technology to deliver a modern luxury lifestyle. It offers a shared ownership model for global clientele, allowing them to co-own culturally inspired villas featuring Japanese gardens, teahouses, and refined architectural design.

Portfolio highlights

• BionicM — BionicM develops high-performance robot prostheses that enhance mobility for people with disabilities.BionicM has been conducting research on innovative technologies since 2015 at the University of Tokyo's Information Systems Engineering Laboratory (JSK) under the guidance of Professor Inaba and utilizing the world's most advancedrobotics research. In 2016, we were adopted by the Japan Science and Technology Agency as part of "Program for Creating STart-ups from Advanced Research and Technology" (START), and in 2018, the company was established as a joint-stock company.
• AndGAMER — AndGAMER is an eSports agency that develops custom controllers and gaming products for players.
• Freecracy — FreeC a platform that connects millions of employers and job seekers by utilizing intelligent matching technology that is powered by AI.

Portfolio highlights

• RINDO — RINDO is a hiring service that connects people interested in or looking to work in forestry with forestry companies across the country.

Portfolio highlights

• Shippo — Shippo is the best multi-carrier shipping software for e-commerce businesses. Find the best shipping rates, integrate with e-commerce platforms, print shipping labels, track package delivery, and verify addresses with either our shipping API or web app.
• CAMPFIRE — Campfire engages in the planning, development, and operation of a crowd funding platform.They operate the largest cloud funding platform in Japan [CAMPFIRE (campfire)], which supports "whoever wants to start something."The fee is 5% of the domestic level, and about 15,000 projects have collected about $70million in total from over700,000 people.
• Spectra Japan — Spectra is a Provision of services for artists and fans company.

Portfolio highlights

• iiba — Iiba is a geospatial platform that specializes in providing location information related to child-rearing.
• Gab — Gab is a company that works to solve social problems as well as develops and markets ethical products.

Portfolio highlights

• Ecbo cloak — Ecbo cloak is a sharing service that connects "persons who want to store luggage with shops with space to store luggage. Instead of coin lockers, you can pre-order places online online and store your luggage in the open space of stores of various types of business.
• TASKAJI — TASKAJI is an online housekeeping service that matches people looking for someone to do their housekeeping with those who want to work as housekeepers.The companies motto is of “from the nuclear family to the extended family” and it aims to provide people with more leisure time through its concept of “housekeeping sharing.

Portfolio highlights

• AssetHub — AssetHub is an AI-powered 3D modeling tool that enables game developers to create and edit 3D assets 100 times faster, enabling mass production of content and combining AI with manual work, enabling faster prototyping and editing.
• Peach Cars — Buy or sell your car in Nairobi-Kenya with ease. Browse a wide range of vehicles, connect with trusted sellers, and find the perfect car today. Simple, fast, and secure transactions.
• AnotherBall — AnotherBall is a blockchain startup that combines entertainment and blockchain.

Portfolio highlights

• On the Trip — On The Trip is an iOS app that turns your iPhone into an GPS-enabled audio travel guide. It was launched last week and is now available on the iTunes AppStore.
• Amateras Space — Amateras Space is a startup driven by the mission to “expand the realm of human activity,” aiming to establish a next-generation spacesuit business by developing advanced, practical technologies that enable humans to work, explore, and thrive in space and other extreme environments.
• RIMM Sustainability — RIMM Sustainability provides a SaaS platform that enables companies of all sizes to optimise their sustainability management effort. It builds tools for sustainability management, reporting and optimisation.

Portfolio highlights

• Enechain — enechain provides liquidity in Japan’s energy market by brokering OTC transactions of energy.
• Parallel — Parallel is the hangout app where you can enjoy games, videos, music, and more with friends.
• Holmes — Holmesis a cloud contract system to consistently carry out the creation, conclusion and management of contracts in the cloud.

Portfolio highlights

• JOYCLE — JOYCLE is a waste management company that specializes in trash recycling, disposal, and environmental consulting services.
• HashPort — HashPort is a leading solution provider that strives to innovate Japan with block chain technology
• Olive Union — Introducing the Olive Smart Ear: A Cool, Affordable Wearable That Removes the Stigma from Impaired Hearing. Each Olive Smart Ear is a single-ear hearing amplifier that improves the sound of everyday life and is customized to your own hearing. When paired to smartphone with Bluetooth, each earbud can also amplify phone

Portfolio highlights

• Jizai — Jizai is a provider of artificial intelligence technology, offering AI solutions, software-as-a-service products powered by AI, and robots that utilize AI capabilities for businesses across various industries. The company focuses on generative AI, large language models (LLMs), and robotics, offering customizable AI platforms and automation tools.It also engages in AI consulting and research collaborations.
• Amptalk — Amptalk is a software development firm specializing in operating automatic transcription and analysis of online business negotiations.
• Media Aid — Media Aid is an advertising agency that provides recruitment, marketing, web creation, and SNS management services

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

• Enechain — enechain provides liquidity in Japan’s energy market by brokering OTC transactions of energy.
• Stock — Stock develops products that relieve the stress of sharing information from teams around the world.
• Overflow — OVERFLOW provides consulting and recruitment services.

Portfolio highlights

• AlgaleX — AlgaleX is a food technology and biotechnology company that develops AI-powered algae fermentation technology to produce sustainable food ingredients, nutritional compounds, and bioproducts. The company leverages proprietary AI-driven cultivation and fermentation systems to convert underutilized food byproducts into high-value microalgae rich innutrients such as DHA, umami compounds, and other functional ingredients. Its mission is to build a circular bioeconomy by reducing food waste while providing sustainable alternatives to marine- and animal-derived ingredients.The company's core technology is Touji-24, an AI-powered algae cultivation and fermentation control system that automates and optimizes microalgae production. Using proprietary fermentation processes and food byproducts such as awamori lees, AlgaleX cultivates algae that can be used to produce Umamo, a plant-based ingredient combining seafood-like umami flavor with high concentrations of DHA. This approach reduces reliance on wild-caught fish as a source of omega-3 fatty acids while upcycling food industry byproducts into valuable nutritional ingredients.

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

• RINDO — RINDO is a hiring service that connects people interested in or looking to work in forestry with forestry companies across the country.

Portfolio highlights

• Mepple — Mepple is planning, developing, and operating internet services.
• Parame — Parame provides human resources, staffing and recruiting services.
• Fabric Tokyo — FABRIC TOKYO is a Japanese startup provides a direct-to-consumer custom-made apparel brand. (former-company name Lifestyle Design Co., Ltd.). It enables customers to save their sizes, idea fabrics, and favorite designs, allowing them to make their original clothing later.FABRIC TOKYO was founded in 2012 by Yuichiro Mori and is based in Tokyo,Japan.

Portfolio highlights

• Gab — Gab is a company that works to solve social problems as well as develops and markets ethical products.
• Aidemy — Aidemy is a web service where you can learn AI programming online.
• Bizibl Technologies — Bizibl Technologies provides SaaS services for recruitment events.

Portfolio highlights

• Gab — Gab is a company that works to solve social problems as well as develops and markets ethical products.

Portfolio highlights

• Gab — Gab is a company that works to solve social problems as well as develops and markets ethical products.

Portfolio highlights

• CAN EAT — CAN EAT is an information-intensive web service that can be expected to prevent allergic accidents.
• Progrit — PROGRIT is an English-related media management company.
• Luup — Luup is Japan's #1 e-scooter and e-bike sharing service provider. Luup currently operates in Tokyo, Osaka, Kyoto, and Yokohama, while planning to expand to other cities all over Japan. The service is based on a high-density port network, where anyone can rent and return to their original fleets.

Portfolio highlights

• Gab — Gab is a company that works to solve social problems as well as develops and markets ethical products.

Portfolio highlights

• For you — For you is a comprehensive Advertising agency business specializing in SNS.
• MoonJapan — MoonJapan is an educational impact startup that offers a variety of programs and thorough assistance.
• Amateras Space — Amateras Space is a startup driven by the mission to “expand the realm of human activity,” aiming to establish a next-generation spacesuit business by developing advanced, practical technologies that enable humans to work, explore, and thrive in space and other extreme environments.

Portfolio highlights

• LOOPARTS — LOOPARTS focuses on high-purity metal resource recycling through molten salt electrolysis technology.

Portfolio highlights

• LOOPARTS — LOOPARTS focuses on high-purity metal resource recycling through molten salt electrolysis technology.
• Edgecortix — At Edgecortix, we automate the design of AI accelerators for on-device deep learning. Our Dynamic Neural Accelerator IP, and performance optimized AI Software & Hardware Co-exploration framework, reduces time to market and brings massive cost savings across multiple industry verticals.
• GlobalComix — GlobalComix provides world class publishing and translation solutions for comics publishers, professionals, and indie creators.

Portfolio highlights

• LOOPARTS — LOOPARTS focuses on high-purity metal resource recycling through molten salt electrolysis technology.

Portfolio highlights

• RINDO — RINDO is a hiring service that connects people interested in or looking to work in forestry with forestry companies across the country.

Portfolio highlights

• DG Capital Group — DG Capital Group is a firm that develops and manufactures devices to connect renewable energy distribution networks to conventional systems.

Portfolio highlights

• Villio — Villio provides talent experience SaaS which helps companies with human resource development and recruitment of talented engineers.
• Back Dooor — Back Dooor is an app that provides 1on1 chatting services with favorite player of the users.
• SPeak — SPeak is an IT services firm that operates web content and matching platforms for global talents. It operates JPort Match, which is involved in direct recruiting services. It is a global career platform for budding new talents.

Portfolio highlights

• CAMPFIRE — Campfire engages in the planning, development, and operation of a crowd funding platform.They operate the largest cloud funding platform in Japan [CAMPFIRE (campfire)], which supports "whoever wants to start something."The fee is 5% of the domestic level, and about 15,000 projects have collected about $70million in total from over700,000 people.

Portfolio highlights

• Tokyo — Tokyo provides consistently-designed signage and projector installation, as well as maintenance company support. All customers need is “product selection” considering installation. This is a service that does not take time and effort!
• Aidemy — Aidemy is a web service where you can learn AI programming online.
• Girasol Energy — Girasol Energy is an IoT Platform provides innovative PLC technologies that enable wiser PV Plants.

Portfolio highlights

• LivCo — LivCo is a support service company that offers HR, life support, real estate rental brokerage, and media platform solutions for foreigners.
• Givearth — Givearth app enable users to make donations just by carrying out their daily shopping and consumption activities.
• Media Aid — Media Aid is an advertising agency that provides recruitment, marketing, web creation, and SNS management services

Portfolio highlights

• LOOPARTS — LOOPARTS focuses on high-purity metal resource recycling through molten salt electrolysis technology.

Portfolio highlights

• CoCooking — CoCooking uses food and cooking to create ample opportunity for dialogue and thought, fostering creativity, diversity, and well-being of individuals and communities.
• Datasection — Datasection is a social big data company that provides various big data analysis tools for its clients. It specializes in marketing research, data provision and processing, image analysis, overseas SNS, and data utilization and optimization. Datasection was founded in 2000.

Portfolio highlights

• CAMPFIRE — Campfire engages in the planning, development, and operation of a crowd funding platform.They operate the largest cloud funding platform in Japan [CAMPFIRE (campfire)], which supports "whoever wants to start something."The fee is 5% of the domestic level, and about 15,000 projects have collected about $70million in total from over700,000 people.

Portfolio highlights

• Taian — Taian, which specializes in bridal industry services and software. They also provide ''Concept Marry,'' which allows couples to design invites and seating charts that match their wedding theme, as well as display guest information on Oiwaii.
• Cloudbase — Cloudbase is an information technology company that specializes in the fields of cloud services and management.
• OPERA TECH — OPERA Lead is a sales-focused AI web chatbot service from Opera Technology that turns websites into 24/7 "exhibit booths" for lead generation.It deploys AI sales assistants on existing sites (via simple tag embedding, no redesign needed) to engage the 99% of visitors who don't convert via inbound methods alone. Key capabilitiesinclude direct booking of meetings, guiding users to whitepapers/webinars, and targeted lead qualification for efficient deal progression.

Portfolio highlights

• Now Do — Now Do provides online growth revolution platform.
• RE — RE specializes in smartphone application design and development.
• Vitalogue Health — Vitalogue Health is a hormone testing service intended to provide access to hormones and medical care. They allow users to self-check the physical condition for pregnancy and how hormones affect it, whether the symptoms are related to menopause, and provide personalized test results, commented on by physicians.

Portfolio highlights

• IVA — IVA ensures the safety of the market towards the threat of counterfeit goods.
• Tyms — Tyms online accounting software for your business connects you to your bank, accountant, bookkeeper, and other business apps. Start a free trial today. Also available in Nigeria, Ghana, Mauritius and South Africa.
• ForCreators — ForCreators is a company operating the virtual talent agency ‘NEXAS', with the goal of globalizing Japan's world-class culture such as anime and VTubers.

Portfolio highlights

• Umitron — Umitron is a data company for aquaculture. We support fish farmers to increase productivity through data analytics. One of the biggest challenges in aquaculture is increasing feeding costs. We optimize feed amount and timing by using fish behavior analytics and water quality data. Our goal is to install Sustainable Aquaculture on Earth.
• nanoFreaks — nanoFreaks builds a rescue system on the sea, creating an environment where everyone can live with peace of mind.
• Bankers Holding — Bankers Holding controls the bankers group companies that provide financial services via internet.

Portfolio highlights

• AlgaleX — AlgaleX is a food technology and biotechnology company that develops AI-powered algae fermentation technology to produce sustainable food ingredients, nutritional compounds, and bioproducts. The company leverages proprietary AI-driven cultivation and fermentation systems to convert underutilized food byproducts into high-value microalgae rich innutrients such as DHA, umami compounds, and other functional ingredients. Its mission is to build a circular bioeconomy by reducing food waste while providing sustainable alternatives to marine- and animal-derived ingredients.The company's core technology is Touji-24, an AI-powered algae cultivation and fermentation control system that automates and optimizes microalgae production. Using proprietary fermentation processes and food byproducts such as awamori lees, AlgaleX cultivates algae that can be used to produce Umamo, a plant-based ingredient combining seafood-like umami flavor with high concentrations of DHA. This approach reduces reliance on wild-caught fish as a source of omega-3 fatty acids while upcycling food industry byproducts into valuable nutritional ingredients.

Portfolio highlights

• Gab — Gab is a company that works to solve social problems as well as develops and markets ethical products.

Portfolio highlights

• Morus — Morus is a university-based biotech startup developing functional food ingredients from silkworms to address global health and nutrition challenges.
• Epicbase — Epicbase is an AI-based automatic voice transcription service based on voice recognition technology.
• Somewhere — Somewhere is engaged in the travel and transportation business.