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.

Mirrativ, Inc.

TSE Growth Market

December 18, 2025

News

Press Release

GB Universe

Funds & Projects

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

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
  • Wataru Katagiri

    Wataru Katagiri

    Investment Group

    Principal

  • Ken Kajii

    Ken Kajii

    Investment Group

    General Partner

  • Keiji Niizu

    Keiji Niizu

    Investment Group

    Fellow

  • Hiroki Takai

    Hiroki Takai

    Investment Group

    Director

  • Tetsuya Urimoto

    Tetsuya Urimoto

    Investment Group

    Director

  • Xin Li

    Xin Li

    Fund Management Group

    Principal

  • Tomoyuki Otsu

    Tomoyuki Otsu

    Investment Group

    Director

  • View full team