Hidehiro Yamaki
Representative Director, President & Chief Executive Officer @ Sumisho Venture Partners
Hidehiro Yamaki is a Series A investor at Sumisho Venture Partners focused on Information Technology and Robotics. Hidehiro Yamaki is the current CEO, President and Representative Director of Sumisho Venture Partners. He previously worked at Sumitomo Corporation as an Investment Development Team Leader.
- Total investments:
- 14
- Last investment:
- Lead investor:
- 29%
Last updated:
For AI agents: llms.txt
Industries Hidehiro Yamaki invests in
Stages Hidehiro Yamaki invests in
Countries Hidehiro Yamaki invests in
Contacts
| Type | Contact | Validation |
|---|---|---|
| Work email | ||
| Personal email | ||
| Work phone | ||
| Personal phone | ||
| Socials |
Investment Focus
Industry
- Information Technology 3 (21%)
- Robotics 2 (14%)
- Marketing 2 (14%)
- Telehealth 2 (14%)
- Generative AI 2 (14%)
Stage
- Series A 3 (21%)
- Series B 3 (21%)
- Seed 2 (14%)
- Series D 2 (14%)
- Venture - Series Unknown 2 (14%)
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| The management service for Supply-chain risks. | $10.9M / Series B / Aug 19, 2026 | ||
| Equitas Medical provides management support for clinics, including operational improvement, strategic planning, recruitment, digital transformation, and back-office administration. It supports business succession for clinic owners by providing transition options intended to maintain patient and staff continuity. The company also promotes healthcaredigital transformation through AI, cloud services, remote-care tools, hospital real-world data use, and medical department digitalization. Its services are intended for healthcare professionals, clinic owners, and healthcare organizations. | $383.4K / Seed / Aug 03, 2026 | ||
| JIZAIE is an artificial intelligence firm that wants to combine VR, robots, and wearable computing to create solution. | $2.5M / Venture - Series Unknown / Jul 07, 2026 | ||
| KUZEN provides enterprise-grade chatbot technologies, especially the bot framework and NLP, via a visual UI without coding. The company is utilizing technology to develop a system that broadens the scope of dialogue. They use technology to provide their customers with next-generation standard procedures that broaden the possibilities ofconversation, resulting in unprecedented business practices. | Secondary Market / Jul 07, 2026 | ||
| KUZEN provides enterprise-grade chatbot technologies, especially the bot framework and NLP, via a visual UI without coding. The company is utilizing technology to develop a system that broadens the scope of dialogue. They use technology to provide their customers with next-generation standard procedures that broaden the possibilities ofconversation, resulting in unprecedented business practices. | $10.1M / Series B / Jul 07, 2026 | ||
| Atom is a humanoid robot built platform. Its bipedal, dual-armed robots are designed not just as industrial tools but as collaborators that expand human capability. By combining advanced Physical AI—environmental perception, judgment, and action planning—with robust robotic hardware, Atom is creating adaptive agents capable of working acrossdiverse settings to augment or, where appropriate, replace human labor. The company positions these robots as a next step in societal evolution: a new class of machines that learn and behave in human-like ways to advance productivity, safety, and quality of life. | $18.8M / Seed / May 27, 2026 | ||
| Secondz Digital is a company that helps businesses transform using generative AI agents. | $1.9M / Series A / May 20, 2026 | ||
| Forest Co., Ltd. operates as an e-commerce aggregator, seeks to identify sustainable, high-quality products and brands that embrace the spirit of Japan and help them grow and enter the global market by using the power of technology. | $27.3M / Series B / Oct 06, 2025 | ||
| MUSVI is an informartion technology company that provides spatial connectivity solutions, and community platform services. | Series A / Apr 17, 2025 | ||
| Bloomo Investment is a software company that specializes in the development of smart and fun investment apps. | $13.5M / Series A / Mar 20, 2025 | ||
| See all 14 investments → | |||
Co-Investors
About Sumisho Venture Partners
Sumisho Venture Partners is a corporate venture capital firm that invests in startups.
Sumisho Venture Partners Contacts
| Name | Phone | Socials | |
|---|---|---|---|
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Hidehiro Yamaki
Representative Director, President & Chief Executive Officer
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FAQ
What does Hidehiro Yamaki invest in?
Hidehiro Yamaki invests primarily in Information Technology, Robotics and Marketing startups, most often at Series A and Series B stage. Most of the 14 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.
How do I contact Hidehiro Yamaki?
Public channels for Hidehiro Yamaki include LinkedIn and Facebook. 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 Hidehiro Yamaki last invest?
The most recent investment recorded for Hidehiro Yamaki closed in Aug 2026. Shizune tracks 14 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 Oct 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.
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