We help startups get ready
to take off on a global scale

Global Brain is an independent venture capital firm that aims to bring new
industries to the society through extensive hands-on support for
startups and open innovation with large corporations.

AUM: $2.6B+
Invested: $1.4B+
Deals: 1,200+
Active Portfolio: 400+
IPO: 42
M&A: 87

Mirrativ is newly listed on
TSE Growth Market.

As one of the largest mobile game streaming platforms in Japan, Mirrativ has achieved drastic growth through creating new communities and game experiences. Global Brain truly wishes Mirrativ even greater prosperity through its continuous endeavors such as new businesses based on its “All for Streamers” strategy.

View press release

Mirrativ, Inc.

TSE Growth Market

December 18, 2025

Portfolio

In recent years, we constantly invest
in more
than 100 startups every
year, maintaining a
top-level
performance globally.

News

Press Release

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GB Universe

View all GB Universe posts

Funds & Projects

We manage flagship funds funded by
institutional
investors and companies,
as well as CVC fund
and co-investment
projects with our partners.

View Funds & Projects

Team

We are a team of globally prominent and
diverse
backgrounds, providing in-depth
support to
our portfolio companies.

Investors: 75
Supporters: 40
Fund Management: 15
Operations: 37

Kikuko Iwama
Investment Group
Director
Joopyo Hong
Investment Group
Partner
Seiichiro Mukai
Investment Group
Director
Kotaro Nagawa
Investment Group
Director
Takashi Moriguchi
Investment Group
Partner
Hogil Doh
Investment Group
General Partner
Tomoaki Ishikure
Investment Group
Partner
View full team

Get in touch

Inquiries from entrepreneurs are greatly
appreciated. Please feel free to contact
us
even if you are in the process of
preparing a
project or if your idea
has not yet taken shape.