# Komasa Mizuki

> Komasa Mizuki is a seed investor at UntroD Capital (Tokyo) backing Space Travel and Manufacturing. See 2 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [UntroD Capital](https://shizune.co/investors/profile/real-tech-holdings)
- Location: Tokyo, Japan
- Total investments: 2
- Last investment: Jan 2025
- Lead investor: 50%
- Last updated: Aug 2026

Komasa Mizuki is a seed investor at UntroD Capital in Tokyo focused on Space Travel and Manufacturing. Komasa Mizuki - Growth Manager @ UntroD Capital

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Space Travel | 2 | 100% |
| Manufacturing | 2 | 100% |
| Software | 1 | 50% |
| Aerospace | 1 | 50% |
| Satellite Communication | 1 | 50% |

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 50% |
| Series A | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Mjolnir Spaceworks | Mjolnir Spaceworks desings and manufactures state-of-the-art novel space rockets with efficient engines as well as other space equipments. | $2M | Series A | Jan 10, 2025 |  |
| Ark Edge Space | ArkEdge Space is a manufacturer of microsatellites aimed at promoting space development and usage. The company develops and tests an ultra-small spacecraft that is responsible for communication and positioning systems for lunar activities, as well as establishes a method for cost reduction and mass production of high-performance 6U satellites,allowing businesses in positioning and communication technology to benefit the community by meeting their space needs. | $3.7M | Seed | Mar 22, 2021 |  |

2 of 2 investments shown.

## Co-investors
- [Incubate Fund](https://shizune.co/investors/profile/incubate-fund) — VC Fund, 2 deals together
- [Mitsubishi UFJ Capital](https://shizune.co/investors/profile/mitsubishi-ufj-capital) — VC Fund, 1 deal together
- [MITSUI SUMITOMO INSURANCE Venture Capital (MSIVC)](https://shizune.co/investors/profile/mitsui-sumitomo-insuarance-venture-capital) — VC Fund, 1 deal together

## About UntroD Capital

VC Fund · Sumida, Japan

UntroD Capital is an R&D-based innovative technology that specializes in social implementation.

5 contacts available at UntroD Capital.

| Name | Title | Profile |
| --- | --- | --- |
| Akihiko Nagata | President and CEO | https://shizune.co/investors/profile/akihiko-nagata |
| Akitaka Wilhelm Fujii | President | https://shizune.co/investors/profile/akitaka-wilhelm-fujii |
| Hiromi Wendy Hiraizumi | Growth Manager | https://shizune.co/investors/profile/hiromi-wendy-hiraizumi |
| Komasa Mizuki | Growth Manager | https://shizune.co/investors/profile/komasa-mizuki |
| Kotaro Chiba | Creative Manager | https://shizune.co/investors/profile/kotaro-chiba-0d07 |

## Similar investors

### Similar stage
- [Antler](https://shizune.co/investors/profile/antler-be9c) — VC Fund
- [Alumni Ventures](https://shizune.co/investors/profile/alumni-ventures-group) — VC Fund
- [Right Side Capital Management](https://shizune.co/investors/profile/right-side-capital-management) — VC Fund

## FAQ

### What does Komasa Mizuki invest in?

Komasa Mizuki invests primarily in Space Travel, Manufacturing and Software startups, most often at Seed and Series A 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.

### When did Komasa Mizuki last invest?

The most recent investment recorded for Komasa Mizuki closed in Jan 2025. Shizune tracks 2 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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