J-STAR is a private equity firm. Team members are concentrated in Tokyo, Japan. Among the 10 companies in the known portfolio are GENEX, AKI-JAPAN, Hot Palette, N Holdings, Nakai Industry Group and Paiza.
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Investment focus
- Stage
- Late-Stage
Contacts
Who to pitch at J-STAR
J-STAR portfolio companies (10)
- GENEX
- AKI-JAPAN
- Hot Palette
- N Holdings
- Nakai Industry Group
- Paiza
- Score Japan Group
- Shinseiki Trading
- Toy Factory
- Yachiyo Care Support
Co-investors
Funds that share portfolio companies with J-STAR.
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About J-STAR
The firm's known deals cluster at Late-Stage.
Of the 5 people on file at J-STAR, Tatsuya Yumoto (Co-founder and Partner) and Gregory Hara (Chief Executive Officer) are listed as the contacts to approach first.
J-STAR shares portfolio companies with one other investment firm, Monex Group.
Frequently asked questions
What is J-STAR?
J-STAR is a private equity firm whose team is concentrated in Tokyo, Japan, with a known portfolio of 10 companies. The portfolio comes from public investment records rather than from the firm, so deals that never surfaced publicly are not in it.
What stage does J-STAR invest at?
The known deals of J-STAR include Late-Stage rounds. Check that against your own round before reaching out: stage mismatch is the most common reason a well matched sector still goes nowhere.
Who should I pitch at J-STAR?
2 of the 5 people on file at J-STAR are listed as contacts for the firm. All 5 have their own profile page.
How do I contact J-STAR?
Any email address on file for the firm is masked on this page and readable inside RaiseHunt after you create an account. The 5 people attached to the firm have their own pages, each showing whether an address is on file for them.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal