Top 10 Oil and Gas Startup Investors in Japan (October 2026)
For AI agents: Short investor table (Markdown), Detailed investor list (Markdown)
| Investor | Relevant Deals | Geography | Stage | Focus | Round Size |
|---|---|---|---|---|---|
|
Energy & Environment Investment
VC Fund
|
2 | Japan, United States, Canada | Series A, Venture - Series Unknown, Series B | Energy, Software, Internet of Things | $915k–$96M |
|
Kyoto Capital Partners
VC Fund
|
2 | Japan | Seed, Series A, Series B | Health Care, Manufacturing, Medical | $102k–$29M |
|
Mizuho Capital
VC Fund
|
1 | Japan, United States, Singapore | Series A, Venture - Series Unknown, Series B | Information Technology, Software, Artificial Intelligence | $661k–$47M |
|
Naoki Aoyagi
Angel
|
1 | Japan | Seed, Angel, Series A | Internet, Fashion, Software | $252k–$9.2M |
|
Seio Nagami
Angel
|
1 | Japan | Seed, Series A, Angel | Task Management, Information Technology, SaaS | $934k–$4.6M |
|
Mitsubishi UFJ Capital
VC Fund
|
1 | Japan, United States, Israel | Series A, Venture - Series Unknown, Seed | Software, Information Technology, Manufacturing | $470k–$21M |
|
Chushin Venture Capital
VC Fund
|
1 | Japan | Series A, Seed, Series B | Biotechnology, Manufacturing, Medical | $955k–$15M |
|
Coral Capital
VC Fund
|
1 | Japan, United States, Denmark | Seed, Series A, Series B | Software, Information Technology, SaaS | $468k–$184M |
|
Yoshinori Fukushima
Angel
|
1 | Japan, Singapore | Seed, Angel, Series A | Internet, Software, Marketing | $222k–$12M |
|
UTokyo Innovation Platform
VC Fund
|
1 | Japan, United States, United Kingdom | Series A, Series B | Biotechnology, Medical, Manufacturing | |
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Investor list
Energy & Environment Investment, Inc. (EEI) is Japan’s first venture capital specialized in the clean technology sector. With core members who have rich hands on experience in founding and managing venture companies, we aim to provide risk money and various strategic values to promising venture companies and businesses.
Show more...Investment focus
- Industry: Energy, Software, Internet of Things
- Stage:Series A, Venture - Series Unknown, Series B
- Geography: Japan, United States, Canada
Investor stats
- Total investments: 134
- Round size: Series A $2.2M–$14M; Series B $3.7M–$96M; Venture - Series Unknown $915k–$13M
- Lead/follow: 18% lead, 82% follow
- Last fund: May invest from a new fund soon — raised $9.1M in 2019
Portfolio highlights
- Esa — Esa offers plastic waste recycling, and also the development and distribution of plastic 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.
Kyoto Capital Partners is an investment company affiliated with the Bank of Kyoto.
Show more...Investment focus
- Industry: Health Care, Manufacturing, Medical
- Stage:Seed, Series A, Series B
- Geography: Japan
Investor stats
- Total investments: 40
- Round size: Seed $102k–$2.9M; Series A $955k–$29M; Series B $1.2M–$16M
- Lead/follow: 8% lead, 92% follow
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.
Mizuho is the venture capital firm affiliated to Mizuho Bank, the second-largest Japanese bank in terms of assets. The firm has headquarters in Tokyo. The firm has ¥49.6 billion JPY under management, focusing on information technology and biotechnology investments. Over 600 Mizuho companies have gone public. According to Nikkei, Mizuho is the fifth-largest venture capital firm in Japan. Mizuho Capital was formed in 2002 by the merger of Fujigin Capital, Tokyo Venture Capital and IBJ Investment. Three firms were subsidiaries of Fuji Bank, Dai-Ichi Kangyo Bank and the Industrial Bank of Japan respectively.
Show more...Investment focus
- Industry: Information Technology, Software, Artificial Intelligence
- Stage:Series A, Venture - Series Unknown, Series B
- Geography: Japan, United States, Singapore
Investor stats
- Total investments: 550
- Round size: Series A $1.4M–$32M; Series B $2.4M–$47M; Venture - Series Unknown $661k–$11M
- Lead/follow: 5% lead, 95% follow
- Last fund: May invest from a new fund soon — raised $92M in 2020
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.
- Flyle — Flyle provides a cloud based platform for product management helping customers to improve productivity & creativity in product development.
- HEARTBEATS — HEARTBEATS builds fan engagement platforms and digital experiences for sports teams, artists, and entertainment brands.
Naoki Aoyagi is a Senior Vice President at GREE, Inc. and Chief Executive Officer of GREE International, Inc. He joined GREE, Inc. in March 2006 from Deutsche Bank, where he had specialized in tech and media sector IPOs and M&A advisory work. At GREE, Aoyagi oversaw the Company's partnership with KDDI and its IPO before leading thedevelopment of GREE’s global operations, a role he continues today. Aoyagi earned a bachelor's degree in policy management from Keio University in 2002.
Show more...Investment focus
- Industry: Internet, Fashion, Software
- Stage:Seed, Angel, Series A
- Geography: Japan
Investor stats
- Total investments: 10
- Round size: Seed $252k–$4.3M; Series A $4.6M–$9.2M
- Lead/follow: 0% lead, 100% follow
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.
Seio Nagami
Show more...Investment focus
- Industry: Task Management, Information Technology, SaaS
- Stage:Seed, Series A, Angel
- Geography: Japan
Investor stats
- Total investments: 6
- Round size: Seed $934k–$944k; Series A $1.4M–$4.6M
- Lead/follow: 0% lead, 100% follow
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.
Mitsubishi UFJ Capital is a venture capital firm focusing on life science, ICT, and high technology investments.
Show more...Investment focus
- Industry: Software, Information Technology, Manufacturing
- Stage:Series A, Venture - Series Unknown, Seed
- Geography: Japan, United States, Israel
Investor stats
- Total investments: 689
- Round size: Seed $470k–$16M; Series A $1.2M–$21M; Venture - Series Unknown $525k–$11M
- Lead/follow: 10% lead, 90% follow
- Last fund: May invest from a new fund soon — raised $94M in 2020
Portfolio highlights
- 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.
- Link Therapeutics — Link Therapeutics specializes in developing therapeutic methods for targeting autoantibodies and identifying pathogenic autoantibodies.
Chushin Venture Capital is a venture capital fund established by Kyoto Chuo Shinkin Bank.
Show more...Investment focus
- Industry: Biotechnology, Manufacturing, Medical
- Stage:Series A, Seed, Series B
- Geography: Japan
Investor stats
- Total investments: 19
- Round size: Seed $1.5M–$2M; Series A $955k–$8.1M; Series B $1.5M–$15M
- Lead/follow: 0% lead, 100% follow
- Last fund: May invest from a new fund soon — raised $2.7M in 2018
Portfolio highlights
- AOI Biosciences — AOI Biosciences is a biotechnology company that creates testing and drug discovery businesses.
- Spectronix — Spectronics is a development of new technologies and new applications to bring about innovation, focusing on the future of laser technology.
- Toregem BioPharma — Toregem BioPharma is a startup from Kyoto University that develops a treatment for congenital adentia. Toregem BioPharma is headquartered in Kyoto, Japan.
Coral Capital is a seed stage venture capital firm in Japan.
Show more...Investment focus
- Industry: Software, Information Technology, SaaS
- Stage:Seed, Series A, Series B
- Geography: Japan, United States, Denmark
Investor stats
- Total investments: 111
- Round size: Seed $468k–$8.5M; Series A $3.2M–$41M; Series B $7.6M–$184M
- Lead/follow: 29% lead, 71% follow
- Last fund: Likely actively investing — fresh fund, raised $6M in 2026
Portfolio highlights
- Facilo — Facilo is a real estate communication provider that uses cloud computing to enhance sales and ease transactions of real estate brokerage.
- Albert Invent — 1000’s of scientists, technicians, and engineers across 30+ countries rely on Albert’s end-to-end Cloud Platform to accelerate the innovation of new materials. With Albert, R&D organizations get the data insights and tools needed to increase speed to market, automate regulatory compliance, and heighten the impact of new products.Built fromthe ground up for the chemical and material science industry, the Albert Platform connects R&D processes and creates a single data source of truth across the R&D organization. Augmented with AI, machine learning and a comprehensive materials database, key platform functionality includes inventory, worksheets, workflows, tasks, and more. www.albertinvent.com
- DeltaForesight — DeltaForesight is a business that creates B2B services and goods with a focus on stablecoins and cryptocurrencies. In order to develop solutions that may be applied in Japan, it emphasizes bridging laws, business practices, and technological advancements.
Yoshinori Fukushima - CEO @ LayerX
Show more...Investment focus
- Industry: Internet, Software, Marketing
- Stage:Seed, Angel, Series A
- Geography: Japan, Singapore
Investor stats
- Total investments: 20
- Round size: Seed $222k–$12M; Angel $457k–$716k; Series A $880k–$6.6M
- Lead/follow: 5% lead, 95% follow
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
The University of Tokyo IPC is a company responsible for expanding the innovation ecosystem of the University of Tokyo. Accelerate global innovation from the University of Tokyo through three activities: start-up support, investment business, and corporate innovation support.It was established as a wholly-owned subsidiary of the University ofTokyo in 2016 with the enforcement of the revised law of the Industrial Competitiveness Enhancement Law, which is the basis law. The investment targets of the Todai IPC are venture companies that utilize the research results and human resources of the University of Tokyo, but they also make FOF (fund of funds) investments in funds managed by some private venture capital companies. In 2019, it started a consortium-type incubation program (University of Tokyo IPC 1stRound) to support the establishment and financing of Tokyo University-related ventures.
Show more...Investment focus
- Industry: Biotechnology, Medical, Manufacturing
- Stage:Series A, Series B
- Geography: Japan, United States, United Kingdom
Investor stats
- Total investments: 65
- Lead/follow: no public data
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.
Oil and Gas Investor funding in Japan at a glance
Stats across 27 deals from 69 investors.
Access all 69 investors in Japan Oil and Gas startups.
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