Yoshifumi Seki
Angel Investor
Tokyo, Japan
Yoshifumi Seki is a seed investor in Tokyo focused on Finance and Security. Yoshifumi Seki is the Senior Researcher and Co-Founder at Gunosy.
- Total investments:
- 3
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries Yoshifumi Seki invests in
Stages Yoshifumi Seki invests in
Countries Yoshifumi Seki invests in
Round sizes
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Round size
- Seed
- $7.6M–$17M
Investment Focus
Industry
- Finance 1 (33%)
- Security 1 (33%)
- Logistics 1 (33%)
- Task Management 1 (33%)
- Financial Services 1 (33%)
Stage
- Seed 2 (67%)
- Venture - Series Unknown 1 (33%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| The core members of Sozi are information technology experts. I have been involved in communication and web service development in the information society. On the other hand, each is familiar with many contents such as manga, anime, and illustrations . | Venture - Series Unknown / Sep 30, 2020 | ||
| Tokyo provides consistently-designed signage and projector installation, as well as maintenance company support. All customers need is “product selection” considering installation. This is a service that does not take time and effort! | $1.1M / Seed / Jul 29, 2019 | ||
| Smartround is a specialized finance management platform for startups and their investors. For start-ups, for entrepreneurs who are not familiar with finance, simply enter the necessary information according to the guide, prepare appropriate financing round, and prepare a function that can simulate and execute a capital increase. Support informationsharing and communication with shareholders even after the capital increase. | $492.7K / Seed / Mar 06, 2019 |
Co-Investors
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FAQ
What does Yoshifumi Seki invest in?
Yoshifumi Seki invests primarily in Finance, Security and Logistics startups, most often at Seed and Venture - Series Unknown stage. Most of the 3 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is Yoshifumi Seki's check size?
Yoshifumi Seki typically joins rounds of $7.6M–$17M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds Yoshifumi Seki participates in.
How do I contact Yoshifumi Seki?
Public channels for Yoshifumi Seki include LinkedIn. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
When did Yoshifumi Seki last invest?
The most recent investment recorded for Yoshifumi Seki closed in Sep 2020. Shizune tracks 3 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.
Is Shizune's investor data accurate?
Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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