Top 10 Oil and Gas Startup Investors in Japan (August 2026)

Portfolio highlights

• ASUENE — Asuene involves in clean power retail business, retail SaaS business, etc.
• Flosfia — FLOSFIA is a spin-off from a research of Kyoto University, specializing in film-formation by mist chemical vapor deposition (CVD). Making use of physical properties of gallium oxide (Ga2O3), FLOSFIA has devoted to development of low-loss power devices.
• TWO — TWO is a health and wellness company that offers innovative lifestyle solutions 2foods, a line of healthy and delicious food products.

Portfolio highlights

• Akari Hosho — Akari Hosho provides a group of trusted professionals, including lawyers and judicial scriveners. Akari Hosho provides a guarantee service.
• Serendip Consulting — Serendip Consulting refers to business portfolio optimization and provision of effective solutions.The Serendip Group operates not only strategic and financial consulting, but also a business company with a focus on manufacturing. Aiming for further growth of the entire group by restructuring the "business portfolio" based on the know-howof nurturing small and medium-sized businesses cultivated over 10 years since its foundation and investment experience, and "modernizing management" by dispatching professional managers You.
• Monozukuri Business Succession Holdings (JMS) — Monozukuri Business Succession Holdings is a specialized corporate investment subsidiary. The platform modernizes mid-sized manufacturing firms facing generational leadership transitions. Strategic institutional banking partnerships protect public shareholder equity from dilution. After acquisition, the firm installs professional management andautomated factory systems. All operational yields consolidate into the parent organization to drive long-term growth.

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

• Nexta — Nexta manufactures site, issues such as analog management, personalization of operations & labor shortages are becoming more serious.
• OOYOO — OOYOO Co., Ltd. is a DeepTech venture that combines international entrepreneurial spirit, and a 'Made In Japan' excellence, to bring the latest innovations in clean technology to society for a smarter, cleaner, and more mobile world.
• Toregem BioPharma — Toregem BioPharma is a startup from Kyoto University that develops a treatment for congenital adentia. Toregem BioPharma is headquartered in Kyoto, Japan.

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

• 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.
• WARPSPACE — ARPSPACE is a space startup originating from the University of Tsukuba, has been launching and working on a satellite development project at the University of Tsukuba for five years until the company was established.
• 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

• 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.
• OOYOO — OOYOO Co., Ltd. is a DeepTech venture that combines international entrepreneurial spirit, and a 'Made In Japan' excellence, to bring the latest innovations in clean technology to society for a smarter, cleaner, and more mobile world.
• KG Motors — KG Motors is an automotive firm that manufactures electric vehicles that can be moved comfortably and safely by one person.

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

• 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.
• FunPep — FunPep is an Industry-university collaboration bioventure company.

Portfolio highlights

• Issin — Issin manufactures bath mats that can measure weight and automatically record daily weight changes on your smartphone.
• RoboTruck — RoboTruck develops autonomous driving technologies for huge trucks, as well as practical applications.
• 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.