Hiroshi Oka, Partner at Spiral Ventures is an active investor based in Japan. This profile covers what Hiroshi Oka backs, at which stage, and how founders can reach out in 2026.
Partner at Spiral Ventures; also holds Japan office and incubation roles at IMJ Investment Partners.
Hiroshi Oka invests in SaaS & Enterprise and Artificial Intelligence, typically at Pre Seed, Seed and Series A.
- Investor type
- VC
- Stages
- Pre SeedSeedSeries A
- Invests in
- SaaS & EnterpriseArtificial Intelligence
- Location
- Japan
- Typical check
- $250K
How to reach Hiroshi Oka
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Cite this page
Round Funded. "Hiroshi Oka." Round Funded investor database, updated November 3, 2026.
Stable URL, it will not change: https://www.roundfunded.com/en/investor/hiroshi-oka
Frequently Asked Questions
Who is Hiroshi Oka?
Hiroshi Oka, Partner at Spiral Ventures is an active investor based in Japan. Hiroshi Oka invests in SaaS & Enterprise and Artificial Intelligence, typically at Pre Seed, Seed and Series A.
What does Hiroshi Oka invest in?
Hiroshi Oka invests in SaaS & Enterprise and Artificial Intelligence, typically at Pre Seed, Seed and Series A. Match your sector and stage, then reach out with a personalized pitch.
What stage does Hiroshi Oka invest at?
Hiroshi Oka typically invests at Pre Seed, Seed and Series A. Lead with traction that fits the stage when you reach out.
What is Hiroshi Oka's typical check size?
Hiroshi Oka typically writes checks around $250K. Use it as a signal for whether your raise fits their stage.
How do founders reach investors like this?
Round Funded lists active investors with verified, professional contact details for signed-up founders. Filter by sector, stage and location, then send a personalized pitch from your own inbox.
What is Round Funded?
Round Funded is an investor database and outreach platform for startup founders. It lists 60,000+ active investors with verified contacts, filtered to recent investment activity, and lets founders send personalized pitches from their own Gmail, track replies, and share a free Data Room. Round+ starts at $99 per month with a 3-day trial.