# Hidehiro Yamaki

> Hidehiro Yamaki is a Series A investor at Sumisho Venture Partners backing Information Technology. See 13 investments, check sizes, portfolio and contact…

- Type: Angel Investor
- Fund: [Sumisho Venture Partners](https://shizune.co/investors/profile/sumisho-venture-partners)
- Total investments: 13
- Last investment: Aug 2026
- Lead investor: 31%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/hidehiro-yamaki-3a004a117
- Facebook: https://www.facebook.com/profile.php?id=100013382141315

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.

## Contacts

5 contacts available for Hidehiro Yamaki: work email, personal email, work phone, personal phone and socials. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-email/hidehiro-yamaki?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Information Technology | 3 | 23% |
| Robotics | 2 | 15% |
| Marketing | 2 | 15% |
| Telehealth | 2 | 15% |
| Generative AI | 2 | 15% |

34 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 3 | 23% |
| Seed | 2 | 15% |
| Series B | 2 | 15% |
| Series D | 2 | 15% |
| Venture - Series Unknown | 2 | 15% |

7 stages tracked in total.

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Equitas Medical Co. | 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 | https://equitas-medical.com |
| JIZAIE | 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 | https://jizaie.co.jp/ |
| KUZEN | 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 | https://corp.kuzen.io |
| KUZEN | 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 | https://corp.kuzen.io |
| Atom | 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 | https://atom-humanoid.com |
| Secondz Digital | Secondz Digital is a company that helps businesses transform using generative AI agents. | $1.9M | Series A | May 20, 2026 | https://secondz.digital |
| Forest | 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 | https://www.forest-inc.jp/ |
| MUSVI | MUSVI is an informartion technology company that provides spatial connectivity solutions, and community platform services. |  | Series A | Apr 17, 2025 | https://x.com/musvi_jp |
| Bloomo Securities | Bloomo Investment is a software company that specializes in the development of smart and fun investment apps. | $13.5M | Series A | Mar 20, 2025 | https://bloomo.co.jp/ |
| SALOWIN | SALOWIN is a shared salon where freelance hairdressers can freely provide customer service and service. | $16.4M | Series D | Feb 14, 2025 | https://salowin.jp |

10 of 13 investments shown.

## Co-investors
- [JAFCO](https://shizune.co/investors/profile/jafco-co-ltd) — VC Fund, 4 deals together
- [SMBC Venture Capital](https://shizune.co/investors/profile/smbc-venture-capital) — VC Fund, 4 deals together
- [UTEC - The University of Tokyo Edge Capital Partners](https://shizune.co/investors/profile/utec) — VC Fund, 4 deals together
- [ANRI](https://shizune.co/investors/profile/anri) — VC Fund, 2 deals together
- [Ik](https://shizune.co/investors/profile/ik) — VC Fund, 2 deals together
- [Headline Asia (formerly Infinity Ventures)](https://shizune.co/investors/profile/infinity) — VC Fund, 2 deals together

## About Sumisho Venture Partners

VC Fund · Tokyo, Japan

Sumisho Venture Partners is a corporate venture capital firm that invests in startups.

1 contacts available at Sumisho Venture Partners.

| Name | Title | Profile |
| --- | --- | --- |
| Hidehiro Yamaki | Representative Director, President & Chief Executive Officer | https://shizune.co/investors/profile/hidehiro-yamaki |

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- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund

## FAQ

### What does Hidehiro Yamaki invest in?

Hidehiro Yamaki invests primarily in Information Technology, Robotics and Marketing startups, most often at Series A and Seed stage. Most of the 13 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 13 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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