# Tomoko Namba

> Tomoko Namba is a seed investor at DeNA backing Artificial Intelligence and Medical. See 15 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [DeNA](https://shizune.co/investors/profile/dena)
- Total investments: 15
- Last investment: Mar 2026
- Lead investor: 60%
- Last updated: Aug 2026
- LinkedIn: http://www.linkedin.com/pub/tomoko-namba/1a/41b/a7a
- X (Twitter): https://twitter.com/tomochinski
- Website: https://x.com/tomochinski

Tomoko Namba is a member of the board and Founder of DeNA. Namba served as the company’s CEO since its founding in 1999 until June 2011. Prior to founding DeNA, she was a partner at McKinsey & Co. She obtained an MBA at Harvard Business School in 1990.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Artificial Intelligence | 4 | 27% |
| Medical | 2 | 13% |
| Computer | 2 | 13% |
| Machine Learning | 2 | 13% |
| Service Industry | 2 | 13% |

43 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 9 | 60% |
| Series A | 3 | 20% |
| Series C | 1 | 7% |
| Funding Round | 1 | 7% |
| Corporate Round | 1 | 7% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Asterminds | Asterminds has created the AI listening agent "InTake" to address the structural problem of "information intake." | $696.9K | Seed | Mar 10, 2026 |  |
| Cosomil | Cosomil develops early diagnostic drugs for diseases and provides research and development support to healthcare companies. |  | Series A | Feb 06, 2026 |  |
| Dishwill | Dishwill produces farm-fresh ingredients for plant-based foods at its plant factories, and also specializes in food processing. |  | Seed | Feb 04, 2026 |  |
| Ocean | Ocean is a technology-driven company dedicated to promoting digital transformation in the tax-free and retail shopping sectors. By developing innovative digital platforms and integrated solutions, the company streamlines tax refund processes and enhances the overall shopping experience for international travelers and retailers alike. |  | Seed | Nov 12, 2025 |  |
| OSHIAI | OSHIAI is an AI chat software that lets you communicate with your favorite idol's "Ai" avatar, which represents their hobbies, preferences, and speaking style. | $473.2K | Seed | Mar 13, 2025 |  |
| Zaimo.ai | Zaimo's AI-driven SaaS budget planning and management software sounds like AI integration can bring significant advantages in automating tasks like tracking expenses, forecasting future spending patterns, and offering personalized budgeting suggestions. | $648.7K | Seed | Feb 04, 2025 |  |
| OptQC | OptQC commercializes cutting-edge optical quantum computing technologies developed by the Furusawa-Endo Laboratory. Because optical quantum computers are more scalable than superconducting and other quantum computing implementations, OptQC's optical quantum computers should reach this scale. They also have benefits like faster processing andreduced power consumption, which makes optical quantum computers a possible long-term pinnacle of quantum technology. | $4.2M | Seed | Jan 23, 2025 |  |
| STRACT | STRACT is a web platform that provides online platform, dating app, knowledge sharing cloud platform, and casual entertainment services. | $6.6M | Series A | Nov 20, 2024 |  |
| Coopel | Coopel is an RPA that allows beginners to easily automate daily tasks and make work efficient. | $938.8K | Seed | Oct 11, 2024 |  |
| YOUTRUST | YOUTRUST is a startup to operate YOUTRUST a referral recruitment platform for side-job change. |  | Series C | May 13, 2024 |  |

10 of 15 investments shown.

## Co-investors
- [ANRI](https://shizune.co/investors/profile/anri) — VC Fund, 3 deals together
- [Globis Capital Partners](https://shizune.co/investors/profile/globis-capital-partners) — VC Fund, 3 deals together
- [Animal Spirits Ltd.](https://shizune.co/investors/profile/animal-spirits-ltd) — VC Fund, 2 deals together
- [Chiba Dojo](https://shizune.co/investors/profile/chiba-dojo) — VC Fund, 2 deals together
- [Coral Capital](https://shizune.co/investors/profile/coral-capital) — VC Fund, 2 deals together
- [East Ventures](https://shizune.co/investors/profile/east-ventures) — VC Fund, 2 deals together

## About DeNA

VC Fund · Tokyo, Japan

DeNA provides a social game platform, social games, e-commerce, and other Web services for mobile devices and PCs. Its current flagship business is its mobile social games platform Mobage which offers first, second, and third-party games on multiple localized player networks worldwide.

5 contacts available at DeNA.

| Name | Title | Profile |
| --- | --- | --- |
| Jun Oi | Executive Officer, Head of Business Planning Division | https://shizune.co/investors/profile/oi-jun |
| Shogo Kawada | Adviser | https://shizune.co/investors/profile/shogo-kawada |
| Tomoko Namba | Executive Chairman | https://shizune.co/investors/profile/tomoko-namba |
| Tomoya Ogawa | Executive Officer, SVP | https://shizune.co/investors/profile/tomoya-ogawa |
| Isao Moriyasu | President / CEO | https://shizune.co/investors/profile/isao-moriyasu |

## 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 Tomoko Namba invest in?

Tomoko Namba invests primarily in Artificial Intelligence, Medical and Computer startups, most often at Seed and Series A stage. Most of the 15 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Tomoko Namba last invest?

The most recent investment recorded for Tomoko Namba closed in Mar 2026. Shizune tracks 15 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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