Breaking
SERIES A: CoA Nexus raises ~¥300M DATABASE: 300,000+ researchers indexed AI: reads 30M+ papers & 1M+ patents BACKERS: Hakuhodo · Lotte Ventures · Innovation Engine OFFICES: Tokyo → Menlo Park FLAGSHIP: CoA Researcher, Japan's largest researcher platform SERIES A: CoA Nexus raises ~¥300M DATABASE: 300,000+ researchers indexed AI: reads 30M+ papers & 1M+ patents BACKERS: Hakuhodo · Lotte Ventures · Innovation Engine OFFICES: Tokyo → Menlo Park FLAGSHIP: CoA Researcher, Japan's largest researcher platform
Company Profile · Deep Tech · HR Technology

CoA Nexus, Inc.

The startup that hires scientists by reading their papers and patents - not their resumes.

CoA Nexus, Inc. logo
The wordmark, in the company's own navy. Seven people sit behind it, quietly indexing the working lives of 300,000 researchers - the sort of number that usually needs a much larger building.
Share LinkedIn Twitter / X Facebook Instagram
The Feature

A resume is a story. A patent is evidence.

Here is a mildly annoying fact about the market for scientists: the best person for your semiconductor problem is almost never reading your job ad. They are in a lab, or on a paper, or halfway through a patent filing, and they have absolutely no idea you exist. The conventional fix is to post the job louder. CoA Nexus, Inc. - a seven-person company headquartered in Chiyoda, Tokyo, with a second desk in Menlo Park - decided to fix the other end of the problem instead.

The premise is that a researcher already publishes their resume, constantly, in public. It is called their body of work. Papers and patents are, if you squint, an unusually honest form of self-description: hard to fake, dated, peer-reviewed, and stuffed with the specific words that describe what a person can actually do. CoA Nexus built an AI that reads that trail - by its own account, more than 30 million research papers and over a million patents - and turns it into a map of who is good at what.

That map is the product. Its flagship platform, CoA Researcher, matches R&D talent with the companies that need it, and the company describes it as the largest researcher-matching platform in Japan. The reach spans the unglamorous, high-stakes fields where hiring is hardest: biotechnology, chemistry, medical science, semiconductors. A newer product, CoA Atlas, points the same engine at recruiters, letting them source from a pool the company sizes at roughly three million R&D professionals.

The clever bit is not that the software finds people. Lots of software finds people. It is that CoA Nexus is willing to say the quiet part out loud: keyword search on a CV is a bad way to judge a scientist, because a scientist's best keywords are the ones they never bothered to put on the CV. Reading the work is slower, harder, and more expensive. It is also, plausibly, correct.

There is a second, softer idea running underneath. CoA Researcher does not only fill permanent jobs; it also books researchers for side work and part-time engagements. This sounds small. It is not. A great deal of specialized talent is locked inside a single employer, doing one thing, while a startup three train stops away would pay handsomely for four hours of that exact brain. Making that trade legible - turning a scientist into someone who can moonlight the way a designer does - is the kind of unglamorous plumbing that quietly changes a labor market.

None of this requires you to believe the grander framing, which the company prints on its own homepage: "Accelerate Deep Tech Revolution, Cultivate a Better Future." That is a lot of capital letters. But strip the slogan and a reasonable business remains - a matching layer for a market that is large, opaque, and badly served by the tools everyone else uses.

Founder and chief executive Kota Nozaki arrives at this from a genuinely odd direction. Before starting the company in 2020 - then named Srust, Inc. - he led project finance and fund formation in renewable energy, the sort of work measured in hundreds of billions of yen and long dam-shaped timelines. Somewhere in there he apparently concluded that the harder bottleneck was not capital or kilowatts but people: the right scientists, findable and mobile. The rename to CoA Nexus in 2024 marked the shift from a single product to a small stack of them - Researcher, Atlas, plus commercialization support (CoA Accel) and a media arm of researcher interviews (CoA Study).

In October 2025 the thesis got a price tag. CoA Nexus raised roughly ¥300 million in a Series A, drawing in a syndicate that mixes the strategic and the financial: advertising conglomerate Hakuhodo, which also entered a capital and business alliance; Lotte Ventures Japan; Innovation Engine; and BlueSeed, alongside debt from financial institutions. That brings total reported funding to about ¥500 million. The money, the company says, goes toward expanding the researcher database internationally and building the features to match across borders - which is what the Menlo Park office is presumably for.

The risks are honest ones. Inferring skill from publications is a genuinely hard inference problem, and being confidently wrong about a scientist is worse than being silent. A seven-person team maintaining a 300,000-person index is leverage right up until it is a staffing constraint. And a two-continent strategy doubles the surface area of everything. But the core wager is a good one, and refreshingly concrete: the resume was always a lossy compression of a person's work. CoA Nexus just decided to read the original file.

"The platform aims to uncover potential candidates that existing job advertisements cannot reach, thereby enhancing talent mobility in the deep tech sector." — CoA Nexus, on its Series A
By The Numbers

The company in six figures.

300K+
R&D professionals indexed
30M+
Research papers read by AI
1M+
Patents analyzed
¥300M
Series A, Oct 2025
~7
People on the team
2
Offices: Tokyo & Menlo Park
¥500M
Total raised to date
2020
Founded (as Srust)
The Stack

Four products, one prefix.

Everything CoA Nexus ships shares the "CoA" badge - and one job: move R&D talent to where it matters.

Matching Platform · 2023

CoA Researcher

The flagship. Connects researchers and scientists with full-time roles and side work across academia and industry - billed as Japan's largest researcher-matching platform.

AI Recruiting · 2025

CoA Atlas

Points the engine at recruiters: analyzes 30M+ papers and 1M+ patents to identify and visualize the skills of roughly 3 million R&D professionals.

Advisory · 2024

CoA Accel

Hands-on support for commercialization, industry-academia collaboration, and building deep tech startups from research.

Media · 2024

CoA Study

A media platform of interviews and career stories from R&D professionals - part editorial, part top-of-funnel for the network.

The Cap Table

Who is betting on researcher matching.

RoundAmountDateBackers
Series A~¥300MOct 2025Hakuhodo, Lotte Ventures Japan, Innovation Engine, BlueSeed, + bank debt
Total to date~¥500M2025Cumulative reported funding

Note: Hakuhodo entered a capital and business alliance alongside its investment. Figures are as reported by public sources and are approximate.

The Record

From project finance to a talent index.

2020

Founded as Srust, Inc.

Kota Nozaki starts the company in Tokyo after a career in renewable-energy project finance.

2023

CoA Researcher launches

The matching platform goes live, connecting scientists with full-time and side-work R&D roles.

2024

Rebrand to CoA Nexus, Inc.

A new name and a broader, multi-product deep-tech talent stack.

2025

CoA Atlas & the Series A

Launches the AI recruiting product and closes a ~¥300M round with Hakuhodo, Lotte Ventures Japan and others.

The People

Who runs it.

Founder & CEO

Kota Nozaki

Led over ¥100 billion of project finance and fund formation at renewable developer Pacifico Energy before founding the company. Now building the matching layer for global R&D talent.

The Backers

A strategic syndicate

Hakuhodo (capital + business alliance), Lotte Ventures Japan, Innovation Engine and BlueSeed - a mix built for brand reach and deep-tech credibility.

Marginalia

Five things worth knowing.

Questions

Frequently asked.

What does CoA Nexus do?

It runs AI-powered platforms that match R&D talent and scientists with companies by analyzing public research papers and patents to visualize each researcher's real skills.

What is CoA Researcher?

CoA Researcher is the flagship matching platform - described as Japan's largest - connecting researchers with full-time positions and side work across fields like biotech, chemistry, medical science and semiconductors.

Who founded CoA Nexus and when?

It was founded around 2020 as Srust, Inc. by Kota Nozaki, who serves as Founder and CEO, and later rebranded to CoA Nexus, Inc.

How much funding has it raised?

It raised a ~¥300 million Series A in October 2025 (investors include Hakuhodo, Lotte Ventures Japan, Innovation Engine and BlueSeed), bringing total reported funding to about ¥500 million.

Where is CoA Nexus based?

Its headquarters is in Chiyoda, Tokyo, Japan, and it also operates an office in Menlo Park, California.