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
41
M&A
84

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
  • Sachiko Sakamoto

    Sachiko Sakamoto

    Investment Group

    Partner

  • Kirin Kato

    Kirin Kato

    Investment Group

    Principal

  • KyungHun Lee

    KyungHun Lee

    Investment Group

    Partner

  • Rina Obi

    Rina Obi

    Investment Group

    Director

  • Tsubasa Sato

    Tsubasa Sato

    Corporate Management Group

    Partner

  • Yosuke Hirai

    Yosuke Hirai

    Investment Group

    Director

  • Tsuyoshi Saito

    Tsuyoshi Saito

    Fund Management Group

    Partner

  • View full team