Top 45 Legal Startup Investors in Japan (September 2026)

Portfolio highlights

• Josan-shes — Josan shes is web start up that offers nursing service to women and babies.
• Atom — Atom is a humanoid robot built platform. Its bipedal, dual-armed robots are designed not just as industrial tools but as collaborators that expand human capability. By combining advanced Physical AI—environmental perception, judgment, and action planning—with robust robotic hardware, Atom is creating adaptive agents capable of working acrossdiverse settings to augment or, where appropriate, replace human labor. The company positions these robots as a next step in societal evolution: a new class of machines that learn and behave in human-like ways to advance productivity, safety, and quality of life.
• Link Therapeutics — Link Therapeutics specializes in developing therapeutic methods for targeting autoantibodies and identifying pathogenic autoantibodies.

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.
• 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.
• Alxtal — Alxtal is a tech company who optimize the development, design, and manufacturing processes of the manufacturing industry with IT and AI.

Portfolio highlights

• OptQC — OptQC commercializes cutting-edge optical quantum computing technologies developed by the Furusawa-Endo Laboratory. Because optical quantum computers are more scalable than superconducting and other quantum computing implementations, OptQC's optical quantum computers should reach this scale. They also have benefits like faster processing andreduced power consumption, which makes optical quantum computers a possible long-term pinnacle of quantum technology.
• Zeal Boxing Fitness — Zeal Boxing Fitness combines power of sports with the power of technology to provide a service that allows to enjoy fitness.
• 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

• CloudLegal — CloudLegal provides AI-powered legal services, combining generative AI with legal expertise to streamline corporate operations.
• Akari Hosho — Akari Hosho provides a group of trusted professionals, including lawyers and judicial scriveners. Akari Hosho provides a guarantee service.
• Hubble — Cloud-based software specialized for contracts and other legal documents

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

• LobbyAI — LobbyAI provides a wide range of services related to artificial intelligence, particularly around database construction and management.
• Genba Hub — Genba Hub specializes in providing business management systems for construction and maintenance enterprises.
• Monochrome — Monochrome is creating a home operating system in order to power the next generation of energy-producing homes and roofs. The company is based in Chuo Ward, Tokyo.

Portfolio highlights

• Noin — Noin specializes in cosmetics and delivers content that accurately captures trends like videos that solve girls worries.
• GITAI — GITAI is the world’s leading space robotics startup, aiming to provide safe and affordable means of labor in space and reduce operational costs by 100 times. GITAI is developing highly capable, safe, and reliable robots to help build and maintain satellites, space stations, lunar bases, and cities on Mars.
• Connected Robotics — Connected Robotics is an information technology company that designs and manufactures robotic arms for enterprises. The company's product, OctoChef, provides cooking services. It caters to individual restaurants, shopping malls, stations, service areas, amusement centers, and large-scale events. The company was founded in 2014 and is basedin Koganei-shi, Japan.

Portfolio highlights

• HEAL-lll — HEAL-lll is a multifaceted firm that merges healthcare, technology, and gamification to promote individual and organizational well-being.
• Pale Blue — Water propulsion systems for sustainable space development
• Rise — Rise is a credit-led platform that enables underserved consumers to access installment-based purchasing power.

Portfolio highlights

• LegalForce — LegalForce is an AI that reduces the workload while improving the accuracy of contract review .
• LegalOn Technologies — LegalOn is a legal AI platform built for contracting. It combines AI, legal content, and team knowledge to streamline contract review. The platform identifies potential risks, suggests redlines, and structures contract data to reduce manual work and improve efficiency in legal processes.

Portfolio highlights

• IGU — IGU is a professional team dedicated to designing, refining, and delivering exceptional entertainment experiences. With a strong focus on creativity, quality, and innovation, IGU brings together talented professionals who transform ideas into engaging and memorable experiences.
• PIMTO — PIMTO Corporation is a technology company that provides digital solutions for location and facility management. Through its PIMT-0 service, it supports airports, stations, commercial facilities, hotels, factories, and public organizations in improving operations, profitability, and customer satisfaction. The company also focuses on addressingsocial challenges such as overtourism, regional revitalization, remote work creation, and improving access to essential services.
• NexusAdvisors — NexusAdvisors operates AvaCareer, an AI-powered recruitment platform that leverages intelligent AI agents to support both companies and job seekers by streamlining hiring processes, enhancing candidate matching, and improving recruitment efficiency.

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.

Portfolio highlights

• Recurrent Energy — As a leading provider of distributed solar power, Recurrent Energy is overcoming the barriers to widespread solar adoption, making renewable energy a practical choice for today's large scale energy users. They are a developer and owner of locally-sited solar power systems, selling clean electricity to their customers worldwide at competitiverates via a Power Purchase Agreement (PPA) or Feed-in Tariffs (FiT). In return, their utility, commercial, and government customers achieve energy independence, predictable pricing, and enhanced sustainability.
• Kyoto Fusioneering — Kyoto Fusioneering is a research & development, design, and manufacture of parts related to fusion reactors.
• FTAI Aviation Ltd — FTAI Aviation is a supplier of CFM56 engines, modules, and materials. They offer aircraft operations and engine maintenance. It offers aviation products that include aircraft leasing, engine leasing, and engine repair capabilities.

Portfolio highlights

• Naorai — Naorai is a food and beverage firm that manufactures wine, beer, spirits, and non-alcoholic beverages.
• Sinumy — Sinumy develops touchless identity authentication technology and high-speed, high-precision position measurement technology.
• Dioseve — Dioseve is providing novel possibilities for all life.

Portfolio highlights

• Sazo — Sazo specializes in constructing a global e-commerce and logistics network with AI.
• Henry — Henry develops and provides a cloud-based electronic medical record and receipt system for small and medium-sized hospitals.
• Greenphard Energy — Greenphard Energy is a uniquely-placed startup in the field of intelligent IoT products based on AI and machine learning technologies. We provide SaaS solutions in the cloud for optimized control, remote monitoring, and analysis of industrial equipment, factories, and renewable energy facilities. We are also a demand response aggregator, helping tostabilize the power supply of the entire region.

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

• HERP — HERP is a recruitment management platform.
• Issues — Issues provides development and management of web service issues that solve the problems.
• 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

• 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.
• Raksul — Raksul.inc is a fabless B2B platform builder. It aims to redesign and simplify value chains in legacy industries. It has enabled the "sharing economy" business model in printing, logistics and advertising, by connecting SME customers directly to excess capacities of existing players in various industries at a low cost.
• Coconala — Coconala operates a website to buy and sell knowledge, skills and, experience from users who are willing to teach. It provides a broad range of services for sellers including fortune-telling, relieving mental anguish, illustration, design, consultation for hobbies, and travel destinations. The company was founded in 2012 and is based in Japan.

Portfolio highlights

• pickupon — Pickupon is a SaaS product that automatically records and inputs calls.
• Bravesoft — bravesoft is a software company that operates events and in-house product for contract development and events. The company offering services such as UI / UX design, application consignment development service, appvisor push, and technical research service.
• ventus Japan — ventus is an Media and Entertainment based company.ventus aiming to be an entertainment company that provides technology that all fans can enjoy.

Portfolio highlights

• RABO — RABO is a Cat-Tech Company that "watches cat life with technology.
• MICOLY — MICOLY is a operator of a website aimed at publishing and selling creative video lessons. The company hosts lectures that are presented by the creators of all categories who are keen on sharing their techniques and philosophies in areas of nail art, Japanese calligraphy, flower arrangement, knitting and many more, as well as interacting with theirpassionate fans, enabling users to take creative lessons and start a new hobby.
• Asoview — Asoview is an online booking website that provides booking services for tour, activities and attractions/experiences.

Portfolio highlights

• Pagaleve — pagaleve offers payment in installments at PIX, with no interest and no credit card required. They provide merchants with a new payment method in order to increase their sales in a simple, uncomplicated, and agile manner, but they also want to provide people with the opportunity to buy what they want without committing to the card'shigh-interest rates and credit.
• FLUX — FLUX provide “FLUX Header Bidding Solution” that creates fair competition opportunities and significantly increases advertising revenue within the header bidding server, ad requests are sent to SSPs and ad exchanges all at once, so it is possible to have a pure price competition without prioritization, and to determine the highest bid amount andvalue of the advertising space. I can. Then, the price of the highest bid ad in the header bidding and the ad set in the ad server are competed, and the ad with the higher bid is delivered.
• Base Power — Base provides a battery-powered home energy service so you can enjoy power without interruption and save money. Now available in select regions of Texas.

Portfolio highlights

• Coconala — Coconala operates a website to buy and sell knowledge, skills and, experience from users who are willing to teach. It provides a broad range of services for sellers including fortune-telling, relieving mental anguish, illustration, design, consultation for hobbies, and travel destinations. The company was founded in 2012 and is based in Japan.
• Fermenstation — Fermen Station provides consulting services on the utilization of local resources, adding value, and creating new products. In addition, develop product development business by utilizing fermentation technology. We also provide education and information on brewing and fermentation technology.

Portfolio highlights

• Enechain — enechain provides liquidity in Japan’s energy market by brokering OTC transactions of energy.
• Stock — Stock develops solutions to eliminate the stress of information sharing for non-IT companies.
• Overflow — OVERFLOW provides consulting and recruitment services.

Portfolio highlights

• HIBARI — HIBARI solves on-site issues through AI and digital twins.
• Unseed — Unseed is a consulting company that provides in-house training in data analysis and AI model development, technical expertise and training.
• Zevero — Carbon Accounting Software and Services. With Zevero optimise your carbon footprint management effortlessly. Take charge of sustainability today!

Portfolio highlights

• Atto — Atto operates in the healthcare and preventive medicine field as a technology venture. Its main business is the development, manufacturing, and sale of health inspection equipment. The core product is a capillary blood flow observation device called Kekkan Bijin. This device allows users to observe capillary blood flow simply by placing a finger onit, without any blood sampling.
• FUNDiT — FUNDiT is an IT-focused M&A and business consolidation company that specializes in acquiring, managing, and scaling IT companies.
• Novius Company — Official Novius Founder and CEO,

Portfolio highlights

• HERP — HERP is a recruitment management platform.
• 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.
• Sincecore — Sincecore is a regtech and corporate governance company. It develops and operates a dialogue governance platform designed to standardize and support corporate compliance operations.

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.
• Smart Craft —
• Luxna Biotech — Luxana Biotech is a biotechnology firm dedicated to promoting the practical use of safe and effective nucleic acid therapies. Utilizing nucleic acid chemistry technology, the company strives to provide nucleic acid medicines to patients suffering from diseases that currently lack effective treatments.

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

• 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

• Raksul — Raksul.inc is a fabless B2B platform builder. It aims to redesign and simplify value chains in legacy industries. It has enabled the "sharing economy" business model in printing, logistics and advertising, by connecting SME customers directly to excess capacities of existing players in various industries at a low cost.
• OPT China — OPT China is a company that provides marketing and distribution support for Chinese consumers.
• Shuttlerock — Create attention-worthy video ads from any asset for every screen, at scale.

Portfolio highlights

• MICOLY — MICOLY is a operator of a website aimed at publishing and selling creative video lessons. The company hosts lectures that are presented by the creators of all categories who are keen on sharing their techniques and philosophies in areas of nail art, Japanese calligraphy, flower arrangement, knitting and many more, as well as interacting with theirpassionate fans, enabling users to take creative lessons and start a new hobby.
• Rentio — Rentio is a site that can be used anytime without buying 1,000 kinds of cameras and the latest home appliances.
• MiddleField — MiddleField is a team to make cars the best entertainment and to make the lives of everyone involved in cars into entertainment. They creates a society where a lot of people are involved as a middle point of all people's dreams. MiddleField owns and operates an e-commerce platform offering cars.

Portfolio highlights

• Henry — Henry develops and provides a cloud-based electronic medical record and receipt system for small and medium-sized hospitals.
• Ruten — Ruten is a brain-machine interface company that specializes in reconstructive treatments for infeasible and ineffective conditions.
• Tokenz — Tokenz is a global payment platform designed to help digital content creators and businesses scale their revenue seamlessly. Supporting payment methods worldwide, Tokenz enables brands to build customizable web stores, optimize conversions, and expand direct-to-consumer sales. As a Merchant of Record (MoR), Tokenz ensures global tax compliance,fraud protection, and multi-currency transactions—allowing businesses to sell with confidence across international markets.

Portfolio highlights

• XDeli — XDeli is a digital application that offers food delivery and meal subsidy service for corporate employees.
• Jiraffe — jiraffe focusses on Internet service planning, development, and management.
• SImount — SImount is a database management system platform that connects all data such as Excel, CSV, PDF. Moreover, It can utilize all the data related to business, leading to higher business efficiency and higher sales.

Portfolio highlights

• Rayout — Rayout is a business consulting company that provides creative content development, recruitment videos, and web production services.
• CareMaker — CareMaker is a technology company that develops and operates visit schedule management and regional collaboration cloud services.
• Rehabilitation 3.0 — Rehabilitation 3.0 focuses on a preventive medical system that provides AI assessment and tracking on health, exercise, mood, and wellness.

Portfolio highlights

• Nexta — Nexta manufactures site, issues such as analog management, personalization of operations & labor shortages are becoming more serious.
• ASUENE — Asuene involves in clean power retail business, retail SaaS business, etc.
• Knowledge Work — Knowledge Work specializes in the development and sales of software for companies.

Portfolio highlights

• WAKUWAKU — WAKUWAKU is a Japanese real estate tech company that focuses on developing a platform that helps users to search for and renovate used housing. In addition, the company offers platforms for building materials e-commerce and marketing automation for the real estate and construction industries.
• Yell Lpi — Yell Lpi is a provider of compensation for legal fees.
• Robot Consulting Co., Ltd — [Metaverse, Intellectual Property, Legal Tech, SaaS] Robot Consulting Introduction Video>>> https://youtu.be/URCrcZ45lbY , Youtube Channel>>> https://www.youtube.com/@robotconsulting , Press Releases>>> https://robotconsulting.net/en-news/

Portfolio highlights

• Prorium — Prorium Co., Ltd. runs an online‑education platform that delivers professional‑skills training through online schools and partner‑school programs. It focuses on wellness and creative‑field courses, creating digital learning environments where learners can study specialized techniques remotely. The company also supports shared‑salon andlearning‑space operations linked to its education ecosystem.
• Back Dooor — Back Dooor is an app that provides 1on1 chatting services with favorite player of the users.
• Kids Snack Lab — Kids Snack Lab is a food manufacturing firm that produces and sells nutritional sweets for children.

Portfolio highlights

• SOUNDRAW — Your personal AI music generator.
• Inter Holding — Inter delivers solutions for global difficulties using vacuum technology, which uses a particular check valve to maintain a 99.5% vacuum rate.
• Better Place — Better place vision is to create a world in which kind people can continue to be kind, as well as a society in which people can work in their own way without worrying about money.

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.
• Sinumy — Sinumy develops touchless identity authentication technology and high-speed, high-precision position measurement technology.
• xCARE — xCARE specializes in the development and commercialization phases of the pharmaceutical and medical device industries.

Portfolio highlights

• Space BD — Space BD aims to become a one-stop shop to respond to all issues related to industrialization of space, and alleviate the work of businesses that are developing new technologies.
• KUZEN — KUZEN provides enterprise-grade chatbot technologies, especially the bot framework and NLP, via a visual UI without coding. The company is utilizing technology to develop a system that broadens the scope of dialogue. They use technology to provide their customers with next-generation standard procedures that broaden the possibilities ofconversation, resulting in unprecedented business practices.
• Neusignal Therapeutics — Neusignal Therapeutics is a medical company that develops therapeutic medicines for dementia and psychiatric illnesses.

Portfolio highlights

• Issues — Issues provides development and management of web service issues that solve the problems.
• Cocoach — Cocoach provides online education service.
• Crediation — Crediation is a digital finance provider that provides small and medium-sized businesses with complete access to financial services to build their enterprises by providing seamless mobile lending experiences. is a stock finance facility focused on helping business owners receive the capital they need to refill their enterprises through convenient,inexpensive, and sustainable loans.

Portfolio highlights

• IVRy — Ivry offers cloud based telephonic answering service.
• Solafune — Solafune integrates multi-domain intelligence across space, cyber, and physical layers to create actionable, sovereign decision systems.
• H2 — H2 Corporation offers an automation solution called "AI Estimation" for estimating tasks.

Portfolio highlights

• xCura — xCura alleviating pain and anxiety of people with the help of technology and product therapy VR.
• Out Loud — Out Loud is an IT company that offers integrated language assistance services with the help of AI and LLM.
• ReLife Technology — ReLife Technology offers online consultation services that help to solve the problems of people who are troubled by marital problems.

Portfolio highlights

• Grafto — Grafto operates “Mylo Magazine,” a platform dedicated to sharing and promoting trend culture, where readers can explore the latest developments in lifestyle, fashion, art, and emerging cultural movements through engaging and curated content.
• FLASH — FLASH is an entertainment and technology startup.
• 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

• TANAAKK — TANAAKK provides “HITSERIES”, Growth-as-a-Service especially for Fortune Global 500 in-house startups to migrate R&D fruits into cloud-native scalable SaaS. HITSERIES delivers reference architecture, platform and related DevOps, RevOps, EquityOps services. There is annually US$190 R&D expenditure solely in Japan. TANAAKK find growth optionin R&D, selecting right cloud business scheme and enabling liquidity for discounted intellectual assets. Usually supporting conglomerate to achieve new $100M SaaS revenue in 5 years.
• Civitas — Civitas enables the creation of a set of documents necessary for legal continuation. Civitas allows the user to create legal documents by entering information in a form. Then Civitas will send the user a set of documents necessary for the application, including the documents that must be submitted together with the application form. Currently, thecompany responds to defamatory comments on Twitter and Bakusai but intends to expand its offerings in the future.
• Leading Mark — Leading Mark, a rising human resources startup in Japan. Leading Mark is branching out into mid-career and international hiring. It currently has a one-man team in China working to bring the top Japanese-speaking Chinese students to domestic companies. He also touts his startup’s focus on the average job seeker. “We want to make sure that the usersget the info that he or she needs the most,” he says. Large scale, legacy players can sometimes prioritize the needs of the hiring company, and their commission, over the needs of applicants themselves. This leads to frustration and short-circuited careers.

Portfolio highlights

• Japan Healthcare — Japan Healthcare is a healthcare start-up that works on the prevention of musculoskeletal diseases with environmentally-friendly preventive medicine . Japan Healthcare Build a preventive system for musculoskeletal diseases with environmentally-improving preventive medicine.
• Japan Healthcare Info — Japan Healthcase Info locates english-speaking doctors for you and makes appointments
• Legal Technology — Legal Technology is into development of cloud-based research tool called 'Legal Library' using legal books.