Top 45 Legal Startup Investors in Japan (October 2026)

Portfolio highlights

• LQUOM — QWAVE offers cryptography communication technology.
• Etaily — Etaily provides e-commerce and retail solutions in the Philippines, enabling brands with end-to-end services, from store management to fulfillment.
• 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.
• Alxtal — Alxtal is a tech company who optimize the development, design, and manufacturing processes of the manufacturing industry with IT and AI.
• EISHIN — EISHIN is a technology company that specializes in pet tech business, recruitment consulting, website creation, and development services.

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.
• Eight Knot — Eight Knot is a developer of autonomous navigation systems intended for water mobility. They provide autonomous ship maneuvering technology using robotics, enabling customers with water-on-demand transportation using environment-friendly EV robotic boats.
• Zeal Boxing Fitness — Zeal Boxing Fitness combines power of sports with the power of technology to provide a service that allows to enjoy fitness.

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

• 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

• 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.
• GEMBA — GEMBA develops on-site improvement DX services specialising in the manufacturing industry.
• 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

• 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

• 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.
• AIONA — AIONA uses AI to produce high-quality products and provides everyone with access to knowledge.
• Yoom — Yoom is a consulting company that offers system development services on AI, IoT, data solutions, and cloud integration.

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

• Facilo — Facilo is a real estate communication provider that uses cloud computing to enhance sales and ease transactions of real estate brokerage.
• ARK — ARK specializes in the research, development, and manufacturing of land-based aquaculture equipment for sustainable fish farming.
• Intentia — Intentia is a technology startupspecializes in developing and implementing AI-driven workflow support tools and operational systems.

Portfolio highlights

• Caguuu — Caguuu offers high-quality designer furniture at affordable prices, through e-commerce, eliminating middlemen and store operating costs.
• Smart Craft —
• Link Therapeutics — Link Therapeutics specializes in developing therapeutic methods for targeting autoantibodies and identifying pathogenic autoantibodies.

Portfolio highlights

• 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.
• Typewriter Therapeutics — Typewriter Therapeutics, Inc. develops mRNA-based gene therapies using a gene writing, or gene writing, platform for precise insertion of therapeutic genes into the genome. The company builds on transposon-based technologies originating from research by Professor Emeritus Haruhiko Fujiwara at the University of Tokyo. Its programs focus on all‑RNA,nonviral gene writing systems that repurpose natural genetic elements to address severe genetic disorders with limited treatment options. Typewriter Therapeutics conducts research and development across its U.S. and Japan operations and collaborates with investors and partners to advance genetic medicine candidates toward the clinic.

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

• Facilo — Facilo is a real estate communication provider that uses cloud computing to enhance sales and ease transactions of real estate brokerage.
• Kiviaq —
• DeltaForesight — DeltaForesight is a business that creates B2B services and goods with a focus on stablecoins and cryptocurrencies.

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

• 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

• Smolt — Smolt is a startup that performs its own recycling type aquaculture of Sakura Mouth.
• 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.
• Bridgesmile Corporation — Bridgesmile operates an on-site installation and replacement service platform.

Portfolio highlights

• 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.
• AOI Biosciences — AOI Biosciences is a biotechnology company that creates testing and drug discovery businesses.
• Neusignal Therapeutics — Neusignal Therapeutics is a medical company that develops therapeutic medicines for dementia and psychiatric illnesses.

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

• 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.

Portfolio highlights

• Fun — Fun is a sightseeing entertainment company that makes the world even more of a fun place.
• Tabinaka — Tabinaka is a Japanese booking & reservation platform for overseas tours and travel activities.
• Fun Group — Hello! We are Fun Group (formally Tabinaka) and we are Japan's first Travel and Leisure startup offering unique tours and experiences. We currently offer experiences in 7 different locations globally.

Portfolio highlights

• Whizzo — Whizzo specializes in materials science-driven manufacturing of engineered fashion and technical textiles. Our expertise lies in creating and executing innovative textile blends tailored for applications across automotive, agriculture, medical textiles, and engineered fashion.
• Furnishka — Furnishka is a furniture industries that provides wide range of products for home decor items, sofa, coffee tables and dining tables.
• First Coffee — Discover the best specialty coffee in India with our range of single origin Arabica beans and exclusive merchandise. Shop online at First Coffee for freshly roasted, quality blends.

Portfolio highlights

• Entaar — Entaar operates a digital transformation platform that aids in optimizing investments, decision-making, and promoting dashboards for businesses to enhance efficiency in digitization.
• Legal Node — Legal Node provides AI-native fixed-price M&A legal services and develops legal AI agent systems for transactions and fundraising.

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

• Noahlogy —
• Solafune — Solafune integrates multi-domain intelligence across space, cyber, and physical layers to create actionable, sovereign decision systems.
• SoVa — SoVa operates an accounting firm that combines technology and experts.

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

• 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

• 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

• Provigate — PROVIGATE is a provider of bio-transistor sensor technologies in Japan.The company's technologies are able to measure dynamic changes with the help of perception-broadening sensors, enabling individuals to change their habits for health
• Spaceflux — As satellites become increasingly vital, Spaceflux tackles the growing challenges of orbital congestion and debris that put them at risk. Thanks to our proprietary global network of optical sensors, we provide data-driven space situational awareness services from LEO to Cislunar.
• Alloyed — OxMet Technologies develops, licenses, and manufactures proprietary alloys, alloy powders and alloy components for the aerospace, automotive, industrial and biomedical markets.

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.
• Hubbl Technologies — Hubbl Technologies helps businesses maximize Salesforce performance and uncover hidden efficiencies with advanced process discovery and org audits.

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

• 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

• Facilo — Facilo is a real estate communication provider that uses cloud computing to enhance sales and ease transactions of real estate brokerage.
• Mikimori Co. — Mikimori Co. distributes Japanese consumer goods, runs marketplace stores, offers QR payment integration, exports.
• Concesionaria Ruta Bogotá Norte SAS — Concesionaria Ruta Bogotá Norte S.A.S. is a specialized infrastructure company.

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.
• Cosmobloom — Cosmobloom Co. is a manufacturing company that analyses, designs, and develops space solar power generation systems and solar power sails.
• Your Neighboring Company — Kimi no Tonari is a Nagoya-based startup specializing in the development and operation of the AI fortune-telling app "Uracchi"

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.
• Fuller — Fuller is a software development company that builds mobile phone applications and provides internet media services. The company’s products include App Ape Analytics and App Ape Lab.App Ape Analytics is a trend research and analysis app that investigates the usage of Android terminal, and offers the viewing rate data; the number of active usersof the application; and user attribute information such as the user’s age gender, the user who is in possession of the application, and more.App Ape Lab analyzes the trends and offers real-time information of the app market.Fuller was founded in 2011 and is based in Chiba, Japan.
• 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.

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.
• HEARTBEATS — ventus is an Media and Entertainment based company.ventus aiming to be an entertainment company that provides technology that all fans can enjoy.