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Mizuho Capital — Portfolio

Investor actively backing innovative startups and growth-stage companies across various industries and funding rounds.

478
Companies
$4.4B
Total invested
$12.9M
Avg. check
72
Industries
Energy 4Artificial Intelligence (AI) 4Consulting 4Software 3Internet of Things 3Manufacturing 3+66 more
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Portfolio companies

Showing 1–24 of 478
Helical Fusion
September 2026

Helical Fusion is a startup company that aims to commercialize fusion energy using magnetic confinement of high-temperature plasmas.

Clean Energy · Tokyo$16.9M Grant
Linea Innovations
September 2026

Linea Innovations is an energy production company that develops commercial fusion reactors with advanced fuel technology.

Energy · Roppongi$12.3M Grant
EX-Fusion
September 2026

EX-Fusion is a laser fusion company that develops commercial laser based nuclear fusion reactor for power generation.

Clean Energy · Osaka$2.6M Grant
Thirdverse
September 2025

Thirdverse is a web3 and virtual reality game studio that develops and operates multiplayer virtual reality games.

Augmented Reality · Tokyo$1.4M Venture - Series Unknown
ElleThermo
September 2024

ElleThermo is an energy company that specializes in the manufacturing and sales of renewable energy generation devices and equipment.

Electrical Distribution · Minato$2.5M Seed
Metagen Therapeutics
September 2026

A clinical-stage company operating Japan’s first GMP-compliant manufacturing platform for fecal microbiota transplantation (FMT) therapies.

Artificial Intelligence (AI) · Tsuruoka$7.7M Venture - Series Unknown
Richka
September 2021

Richika Cloud Studio is a marketing video generation tool that utilizes professional know-how.

Marketing · Yoyogi-sanyachoVenture - Series Unknown
Vook
September 2023

Vook is a media company that provides smartphones, digital signage, metaverse, and video creation and development services.

Internet · Tokyo$2.7M Corporate Round
AIONA
September 2026

AIONA uses AI to produce high-quality products and provides everyone with access to knowledge.

Artificial Intelligence (AI) · Shibuya$881K Seed
Power Laser
September 2026

Power Laser is a tech company that develops cutting-edge power laser technology and applications for various industries.

Laser · Suita$7.5M Series A
Aeterlink
September 2026

Aeterlink is a manufacturing company that develops wireless power transfer technology for wireless devices.

Internet of Things · Kinshicho$12.1M Venture - Series Unknown
Lavol
September 2025

Lavol will promote widespread use of money, which is the payment for valuable labor, and create a society.

Setagaya$14.9M Debt Financing
OptQC
September 2026

OptQC develops photonic quantum computing technologies aimed at making quantum computers practical for industrial and societal applications.

Computer · Toshima$44.4M Grant
AGRIST
September 2025

AGRIST is a a smart agriculture company that uses robotics and software technology to overcome agricultural challenges.

Agriculture · TakajoSeries B
SpeakBuddy
September 2024

SpeakBuddy is an edutech company that develops and operates an AI-based ​​english conversation application.

Apps · TokyoVenture - Series Unknown
Yoom
September 2026

Yoom is a consulting company that offers system development services on AI, IoT, data solutions, and cloud integration.

Artificial Intelligence (AI) · Tokyo$4.5M Seed
Fotographer AI
September 2024

Fotographer AI is a tool that allows brands and enterprises to generate product photos automatically.

E-Commerce · Higashi-shinagawaNon-equity Assistance
Paytner
September 2026

Paytner is a finance firm that provides factoring services to support freelance people's funding.

Accounting · Tokyo$14.4M Series D
ACROVE
September 2024

ACROVE is an e-commerce platform that provides insights into customer behavior, market trends and competitor performance.

Consulting · Akasaka$14.1M Series C
HEARTBEATS
September 2026

HEARTBEATS is a media and entertainment company that offers digital trading cards for variety of sports and entertainment fan business.

Content · Tokyo$15.0M Series C
PlaceHolder
August 2025

PlaceHolder is Development and management of digital theme parks "Little Planet".

Architecture · TokyoSeries C
N.B.Medical
August 2024

N.B.Medical develops medical devices to detect neurovascular disease and implement digital technologies for the healthcare sector.

Health Care · Tokyo$13.7M Series B
WorkX
August 2024

WorkX is a startup company that provides sustainable regional development, in-house consulting, pro-connect matching services.

Consulting · Tokyo$889K Venture - Series Unknown
Robot Start
August 2026

Robot Start is a company specializing in robot related business with the main target of communication robot.

Electronics · TokyoVenture - Series Unknown

Where Mizuho Capital invests

Energy4
Artificial Intelligence (AI)4
Consulting4
Software3
Internet of Things3
Manufacturing3

About Mizuho Capital's portfolio

How many companies has Mizuho Capital invested in?▸

Mizuho Capital has invested in 478 companies tracked in our database. The portfolio spans multiple industries and funding stages, from seed-stage startups to late-stage companies.

What industries does Mizuho Capital invest in?▸

Mizuho Capital's top investment sectors include Energy, Artificial Intelligence (AI), Consulting, Software, Internet of Things. The firm invests across 72 different industry categories.

What is Mizuho Capital's largest investment?▸

Among tracked funding rounds, OptQC received $44.4M in a Grant round. Mizuho Capital's total known invested capital is $4.4B.

What is the average investment size for Mizuho Capital?▸

Mizuho Capital's average investment size is $12.9M across its portfolio of 478 companies.

What are Mizuho Capital's most recent investments?▸

Recent Mizuho Capital portfolio additions include Helical Fusion, Linea Innovations, EX-Fusion, Thirdverse, ElleThermo. These companies were founded in 2020 or later.

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