# Akitomo Naoi

> Akitomo Naoi is a Series A investor at Spiral Capital (Tokyo) backing Energy and Manufacturing. See 8 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Spiral Capital](https://shizune.co/investors/profile/spiral-capital)
- Location: Tokyo, Japan
- Total investments: 8
- Last investment: Jul 2026
- Lead investor: 38%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/akitomo-naoi-707826a4

Akitomo Naoi is a Senior Associate at Spiral Capital.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Energy | 2 | 25% |
| Manufacturing | 2 | 25% |
| Apps | 1 | 13% |
| News | 1 | 13% |
| Content | 1 | 13% |

19 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series A | 4 | 50% |
| Seed | 2 | 25% |
| Series B | 1 | 13% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| AZUL Energy | AZUL Energy is a next-generation energy device that improves air battery performance, develops air battery-related products, and proposes eco-friendly and comfortable new lifestyles. They discovered that a catalyst electrode containing one of these pigments performed better than platinum carbon or existing catalyst electrode materials. |  | Series A | Jul 30, 2026 |  |
| Turing | Turing develops and manufactures fully autonomous vehicles. | $62.9M | Series A | Nov 17, 2025 |  |
| Miresso | Miresso is a startup firm that offers nuclear fusion power generation services through natural resources. | $28.8M | Series A | Aug 07, 2025 |  |
| StoryHub | StoryHub is a powerful all-in-one AI editing assistant designed to help users create high-quality content quickly, efficiently, and at a significantly lower cost. Whether you're drafting blog posts, polishing articles, scripting videos, or refining marketing copy, StoryHub streamlines the entire content creation process with intelligent tools | $1.5M | Series A | Jul 24, 2025 |  |
| Enerbank Japan | Enerbank is a development and operation of electric power auction system. | $3.9M | Series B | Dec 02, 2024 |  |
| Turing | Turing develops and manufactures fully autonomous vehicles. | $9.3M | Seed | Jul 01, 2024 |  |
| Planet Savers | Planet Savers is situated in Tokyo. The company is developing a direct air capture system that uses DAC technology to remove carbon dioxide from the atmosphere. The company's system directly absorbs and collects carbon dioxide from the atmosphere in order to mitigate climate change by attaining net zero carbon dioxide emissions. This allowsclients to lower the entire quantity of carbon dioxide that cannot be reduced through energy conservation or emissions reduction. | $1.6M | Seed | Apr 30, 2024 |  |
| AZUL Energy | AZUL Energy is a next-generation energy device that improves air battery performance, develops air battery-related products, and proposes eco-friendly and comfortable new lifestyles. They discovered that a catalyst electrode containing one of these pigments performed better than platinum carbon or existing catalyst electrode materials. | $2.2M | Series A | Oct 25, 2023 |  |

8 of 8 investments shown.

## Co-investors
- [Genesia Ventures](https://shizune.co/investors/profile/genesia-ventures) — VC Fund, 3 deals together
- [Mitsubishi UFJ Capital](https://shizune.co/investors/profile/mitsubishi-ufj-capital) — VC Fund, 3 deals together
- [Global Brain Corporation](https://shizune.co/investors/profile/global-brain-corporation) — VC Fund, 2 deals together
- [JAFCO](https://shizune.co/investors/profile/jafco-co-ltd) — VC Fund, 2 deals together
- [JIC Venture Growth Investments](https://shizune.co/investors/profile/jic-venture-growth-investments) — VC Fund, 2 deals together
- [NTT DOCOMO Ventures](https://shizune.co/investors/profile/ntt-docomo-ventures) — VC Fund, 2 deals together

## About Spiral Capital

VC Fund · Tokyo, Japan

Spiral Capital is a venture capital fund.

3 contacts available at Spiral Capital.

| Name | Title | Profile |
| --- | --- | --- |
| Akitomo Naoi | Senior Associate | https://shizune.co/investors/profile/akitomo-naoi |
| Hiroshi Oka | Representative Partner | https://shizune.co/investors/profile/hiroshi-oka |
| Shuzo Ueki | Associate | https://shizune.co/investors/profile/shuzo-ueki |

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

## FAQ

### What does Akitomo Naoi invest in?

Akitomo Naoi invests primarily in Energy, Manufacturing and Apps startups, most often at Series A and Seed stage. Most of the 8 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Akitomo Naoi last invest?

The most recent investment recorded for Akitomo Naoi closed in Jul 2026. Shizune tracks 8 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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