Top 5 Clean Energy Startup Investors in Japan in February 2025

Last updated: Feb 2025 A list of 5 angel investors and VC (Venture Capital) funds that invest in Clean energy startups based in Japan. We rank investors based on the number of investments they made in Clean energy companies from Japan. We update this investor list every month.

Top 5 Clean Energy Startup Investors in Japan in February 2025

Investor	Clean Energy Japan investments
Global Brain Corporation	1
ReGACY Innovation Group	1
Incubate Fund	1
Tsuneishi Partners	1
SBI Investment	1

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Investor list

Global Brain Corporation is a venture capital firm that invests in companies from seed or early to pre-IPO startups. Global Brain has invested in 300+ startups from seed/early to pre-IPO startups and achieved 25 IPOs and 61 M&As as a result of providing hands-on support services and resources to its portfolio startups. Global Brain hasmanaged a pure investment fund as well as multiple corporate venture capital funds partnered together with tier 1 public companies of telecom, real estate development, financial service, beverages, agriculture food, logistics, and electronic devices.

Investment focus

Information Technology, Software, Artificial Intelligence
Series A, Series B, Funding Round
Japan, United States, United Kingdom

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.
MOSH Japan — MOSH is a web page creation services for individual business owners.
Smart Education — Smart Education, Ltd. (located in Tokyo, Japan, President Daigo Ikeya) launched it’s kid’s music app “Rhythm Book” for smartphones and tablets. It’s in the App Store as an universal app for iPhone, iPad and iTouch. With Rhythm book, kids can learn and feel the rhythm by tapping instruments along with their favorite songs. There are more than 100kid’s songs from TV, cartoons, to choose from and nursery rhymes in English and in Japanese. Stimulate the young mind with genuine and real studio recorded music and sounds. This app is designed to co-play between parents and child. You can purchase more songs via internet and the songs you’ve purchased can be co-owned by the same Apple ID through iCloud.

ReGACY Innovation Group offers complete co-creation support, from discovery to commercialization and monetization.

Investment focus

Nuclear, CleanTech, Clean Energy
Seed
Japan

Portfolio highlights

Blossom Energy — Developed advanced nuclear reactors that are able to produce clean energy, Blossom Energy manufactures nuclear reactors for the nuclear energy industry. The focus of the company is on providing affordable, stable, and sustainable energy for the world. The company utilizes HTGR, which is a fourth-generation nuclear reactor.

Incubate Fund is an independent early-stage venture capital that specializes in providing capital to technology startups at the seed stage. The firm built a portfolio of over 300 companies in Asia, taking 12 companies to public and 20 companies to M&A exit since 2010.

Investment focus

Software, Information Technology, E-Commerce
Seed, Funding Round, Series A
Japan, United States, India

Portfolio highlights

Kaguoku — Kaguoku develops and provides the AI-based home staging services. It offers a service that uses AI to process interior photos of real estate properties to increase the property's ability to attract customers.
Time Prediction — Time Prediction focuses on development of diagnostic pharmaceuticals, drugs and medical devices for the treatment of neurological diseases.
Mjolnir Spaceworks — Mjolnir Spaceworks desings and manufactures state-of-the-art novel space rockets with efficient engines as well as other space equipments.

Tsuneishi Partners provides services and products in shipbuilding, shipping, environmental, energy, and services. With regard to product development, the company has a lineup of container carriers and tankers centered on bulk cargo ships to meet the needs of various markets. It was established in 1917 and is based in Hiroshima, Japan.

Investment focus

Apps, SNS, Translation Service
Seed, Series A
Japan

Portfolio highlights

JaQool, Inc. — JaQool is a company that will leverage social innovation and new technologies to create convenient services that are something to get excited about. Three entrepreneurs from different backgrounds have gathered together to utilise these new technologies and techniques to develop services that can help to make the world a better place.JaQool willinitially work on a mobile translation service for tourists coming to Japan from overseas. The number of tourists from overseas has been increasing rapidly in recent years, but many have encountered difficulties due to being unable to understand Japanese. Removing the language barrier is a pressing challenge that needs to be addressed, particularly in preparation for the Tokyo Olympics that will be held in 2020. JaQool can help contribute towards a solution.
Kotozna — Kotozna is an IT service company that aims to solve the social problem of "language cave" using cutting-edge technologies such as AI and machine translation. Multilingual translation services such as "Kotozna Chat", which provides messaging with simultaneous translation between different SNS platforms, and "KotoznaCamera", which translates Japanese content such as restaurant menus and displays them by QR code scanning.
Blossom Energy — Developed advanced nuclear reactors that are able to produce clean energy, Blossom Energy manufactures nuclear reactors for the nuclear energy industry. The focus of the company is on providing affordable, stable, and sustainable energy for the world. The company utilizes HTGR, which is a fourth-generation nuclear reactor.

SBI Investment supports the business development and growth of private venture companies through fund investment. It manages and manages venture capital funds under the management philosophy of becoming a leading company responsible for the creation and development of core industries in the 21st century as a "new industry creator".SBIInvestment has invested in a total of 986 companies in the past, of which 169 (17.1% of investment companies) have exited through IPO or M & A.