Masa Isono works as a Principal at DEFTA Partners. The firm's known portfolio counts 8 companies.
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Investment focus
- Sector
- AIConsumerHealthcareSaaS
Contacts
Affiliated funds' portfolios
Principal at DEFTA Partners, whose known portfolio counts 8 companies
- 1World Online
- TARA Biosystems
- Actuate Therapeutics
- Acepodia
- DiA Imaging Analysis
- Endogena
- Aegle Therapeutics
- InformAI
Investor Profile
The listing covers sectors AI, Consumer, Healthcare and SaaS, and focus areas Analytics, Biotech, Clinical Trials and Computer Vision. Startups operating in these areas may find Masa Isono relevant.
Stage-wise, the deals at DEFTA Partners cluster around Seed, Series A and Series B rounds.
What the affiliated firm has backed is the closest available signal on whether Masa Isono is worth approaching.
Colleagues at DEFTA Partners
Frequently asked questions
Who is Masa Isono?
Masa Isono is a venture capital investor based in San Francisco, California, United States, listed as Principal at DEFTA Partners. The known portfolio of that firm counts 8 companies. That portfolio belongs to the firm, not to Masa Isono personally.
What does Masa Isono invest in?
Listed sectors include AI, Consumer, Healthcare and SaaS; listed focus areas include Analytics, Biotech, Clinical Trials and Computer Vision. Those tags come from the portfolios of the firms this profile is attached to, so they read as a record of what has been backed rather than a stated preference for what comes next.
What stage does Masa Isono invest at?
DEFTA Partners appears in Seed, Series A and Series B rounds across its known deals, and Masa Isono is listed there as Principal. Stage is the strongest single filter when you build a target list: an investor with no record at your stage rarely starts with you.
Which firm is Masa Isono listed at?
Masa Isono is listed as Principal at DEFTA Partners. 2 other people in the database share a firm with Masa Isono.
How do I contact Masa Isono?
An email address, a phone number and a LinkedIn page are on file for Masa Isono. The address stays masked on this page and is readable inside RaiseHunt after you create an account.
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Data: RaiseHunt investor dataset · Snapshot 5 September 2026 · How this data is built · Report a correction or request removal