HiJoJo Partners Inc.
Tokyo asset manager whose funds invest in mid- to late-stage unlisted companies, mainly unicorns.
🇯🇵 Nishi-Shinbashi, Minato-ku, Tokyo · Founded 2017
Series B to Growth·Co-invests
HiJoJo Partners Inc. is an independent asset manager in Tokyo, founded in 2017 by Spyridon Mentzas. It structures, distributes and manages closed-end funds that invest mainly in mid- to late-stage unlisted startups, particularly unicorns, in Japan and overseas. It sells the funds to individual and institutional investors in person (HiJoJo Prime) and online (HiJoJo.com). It also runs HiJoJo Private Market, which offers investor introductions, cross-border M&A support and IPO advice to startups. It is a registered financial instruments business in Japan.
What they invest in
We structure, distribute and manage funds that invest mainly in mid- to late-stage unlisted startups, particularly unicorns, in Japan and overseas. Our purpose is Unlocking Investment, Transforming Markets, Empowering Japan.
- Stage
- Series B to Growth
- Also buys secondaries
- Role in a round
- Co-invests
- Fund
- 85 funds launched · ¥60B+ total fund sales (June 2026)
- Artificial intelligence
- Fintech
- Space
- Software
- United States
- Japan
- Global
How to pitch
Openfor introduces founders whose company fits the criteria above.
Open to
HiJoJo Private Market offers startups investor introductions, global equity offerings, cross-border M&A and partnership support, and IPO and capital market advice. It also lists events, seminars and mid- to late-stage accelerator programs. Startups can reach that team through the inquiry form on the firm's site. The site has no page for sending a pitch deck.
Portfolio
Its funds hold stakes in late-stage private companies such as SpaceX, Stripe, Anthropic, Databricks and xAI, plus SmartHR and Gojo & Company in Japan. The firm has also made direct strategic investments in nine startups and in Nasdaq Private Market. PitchBook counts 64 investments and 15 exits.
Some of the companies they have backed
The portfolio at a glance · 39 companies · 2021–2026 · 5 exits
Sectors
- Artificial Intelligence5%
- AI Foundation Models3%
- AI Infrastructure3%
- Augmented Reality3%
- Other62%
Stage when they invested
- Series B3%
- Series C+5%
Where the companies are
- 🇺🇸 United States33%
- 🇯🇵 Japan5%
Named on the firm's own sites, PitchBook and Shizune, as of Oct 2026. The firm shows only selected companies; PitchBook counts 64 investments.
Co-investors and partners
Funds that invested in the same rounds.
