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

Portfolio highlights

• Akari Hosho — Akari Hosho provides a group of trusted professionals, including lawyers and judicial scriveners. Akari Hosho provides a guarantee service.
• Kyoto Fusioneering — Kyoto Fusioneering is a research & development, design, and manufacture of parts related to fusion reactors.
• 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.

Portfolio highlights

• TWO — TWO is a health and wellness company that offers innovative lifestyle solutions 2foods, a line of healthy and delicious food products.
• 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.
• Advance Composite — Advance Composite is a manufacturing company that develops composite materials and molten metal forging-based products.

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

• 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.
• 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

• 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

• 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

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