# San-Ai Oil

> San-Ai Oil is a VC fund in Otemachi backing Water and Robotics. See 2 investments, check sizes, portfolio and contact details. Updated Aug 2026.

- Type: VC Fund
- Location: Otemachi, Japan
- Total investments: 2
- Last investment: Jul 2024
- Lead investor: 0%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/company/san-ai-oil/
- Website: http://www.san-ai-oil.co.jp/

San-Ai Oil is a VC fund in Otemachi focused on Water and Robotics. San-Ai Oil deals in petroleum products, aviation fuel storage and related services.

## Contacts

5 contacts available for San-Ai Oil. Shizune tracks 1 team members at San-Ai Oil. Sign up free to unlock them: https://app.shizune.co/sign-up/investor-profiles/find-team-emails/san-ai-oil?utm_source=investor_profile

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Water | 1 | 50% |
| Robotics | 1 | 50% |
| CleanTech | 1 | 50% |
| Water Purification | 1 | 50% |
| Information Technology | 1 | 50% |

## Team

| Name | Title | Investments | Profile |
| --- | --- | --- | --- |
| Hiroshi Hayata | President and CEO | 1 | https://shizune.co/investors/profile/hiroshi-hayata |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| avatarin | avatarin develops next-generation mobility and human augmentation platforms. | $23.5M | Series B | Jul 18, 2024 |  |
| WOTA | WOTA specializes in the development of small-scale decentralized water recycling systems and autonomous control systems for water treatment. The company has established a cyclical model in which wastewater is reimagined as the most accessible water source and is recycled on-site for repeated domestic use. WOTA has created an innovative householdsolution known as a small-scale decentralized water recycling system, which transforms the seemingly unattainable goal of water recycling at the household level into a reality, utilizing our core technology powered by autonomous water treatment managed through sensors and data science. |  | Series B | Jun 19, 2023 |  |

2 of 2 investments shown.

## Co-investors
- [Fuyo General Lease](https://shizune.co/investors/profile/fuyo-general-lease) — VC Fund, 2 deals together
- [Mizuho Bank](https://shizune.co/investors/profile/mizuho-bank) — VC Fund, 2 deals together
- [Sumitomo Mitsui Trust Bank](https://shizune.co/investors/profile/sumitomo-mitsui-trust-bank) — VC Fund, 2 deals together
- [Daiki Axis](https://shizune.co/investors/profile/daiki-axis) — VC Fund, 1 deal together
- [DBJ Capital](https://shizune.co/investors/profile/dbj-capital) — VC Fund, 1 deal together
- [Dentsu Ventures](https://shizune.co/investors/profile/dentsu-ventures) — VC Fund, 1 deal together

## Similar investors

### Similar stage
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [General Catalyst](https://shizune.co/investors/profile/general-catalyst-partners) — VC Fund
- [FJ Labs](https://shizune.co/investors/profile/fj-labs) — VC Fund

## FAQ

### What does San-Ai Oil invest in?

San-Ai Oil invests primarily in Water, Robotics and CleanTech startups, most often at Series B stage. Most of the 2 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 San-Ai Oil?

Public channels for San-Ai Oil include LinkedIn and the website linked on this profile. 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.

### Who are the partners at San-Ai Oil?

The team at San-Ai Oil includes Hiroshi Hayata (President and CEO). The Team section lists each member with their title, investment count and links.

### 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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