# Junichi Nakajima

> Junichi Nakajima is a Series B investor at DG Lab (Tokyo) backing Apps and Big Data. See 2 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [DG Lab](https://shizune.co/investors/profile/dg-lab-fund)
- Location: Tokyo, Japan
- Total investments: 2
- Last investment: Jan 2021
- Lead investor: 50%
- Last updated: Aug 2026
- LinkedIn: https://jp.linkedin.com/in/junichi-nakajima-jun-nakajima-a5b31221

Junichi Nakajima is a Series B investor at DG Lab in Tokyo focused on Apps and Big Data. Executive Manager at DG Lab Fund

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Apps | 1 | 50% |
| Big Data | 1 | 50% |
| Web Apps | 1 | 50% |
| Analytics | 1 | 50% |
| Marketing | 1 | 50% |

11 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Series B | 1 | 50% |
| Series C | 1 | 50% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Japan | 1 | 50% |
| Switzerland | 1 | 50% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| 1plusX, a TripleLift company | We empower publishers and advertisers to take control of their first-party assets to drive business results. Our real-time data management, data clean room, and CTV solutions converge to help customers engage their audiences with more meaningful and personalized content and advertising. We support publishers in monetizing their inventory andoptimize advertisers’ marketing performance through data. So far, we’ve enhanced the marketing performance of companies around the world including Axel Springer, BI Garage, Le Figaro, South China Morning Post, and Tegna. Founded in 2014, we’re a global MarTech company operating in Europe, Asia, and the US. 1plusX is built on the principles of collaboration, trust, privacy, and transparency. From our technology all the way to our customers, we value our partnerships to stay forward-thinking and adaptable in the ever-changing digital media ecosystem. | $7.8M | Series B | Jan 20, 2021 |  |
| Repro | Repro is a mobile analytics tool that offers insights into mobile app users through play-by-play videos of their behavior. It was launched in 2014 and is operated from Tokyo, Japan. | $27.3M | Series C | Feb 13, 2020 |  |

2 of 2 investments shown.

## Co-investors
- [YJ Capital](https://shizune.co/investors/profile/yj-capital) — VC Fund, 2 deals together
- [BI.Garage](https://shizune.co/investors/profile/bi-garage) — VC Fund, 1 deal together
- [DG VENTURES](https://shizune.co/investors/profile/dg-incubation) — VC Fund, 1 deal together
- [Global Brain Corporation](https://shizune.co/investors/profile/global-brain-corporation) — VC Fund, 1 deal together
- [JAFCO](https://shizune.co/investors/profile/jafco-co-ltd) — VC Fund, 1 deal together
- [KDDI](https://shizune.co/investors/profile/kddi) — VC Fund, 1 deal together

## About DG Lab

VC Fund · San Francisco, United States

DG Lab Fund is a unique, non-conventional venture capital fund that combines both investment and world-class R&D capabilities to dramatically accelerate and incubate its investments. The fund focuses on five core technologies, including blockchain, AR/VR, AI, security, and BioHealth.DG Lab Fund is focused on blockchain, AR/VR, AI,security, and BioHealth, as they are likely to be at the foundations of future businesses. In addition to the five core technologies, the fund will also focus on IoT technologies, which often overlap or serve as an application layer.

3 contacts available at DG Lab.

| Name | Title | Profile |
| --- | --- | --- |
| Junichi Nakajima | Executive Manager | https://shizune.co/investors/profile/junichi-nakajima |
| Kaoru Hayashi | President and Group CEO | https://shizune.co/investors/profile/kaoru-hayashi |
| Masahito Okuma | Member of the Board of Directors, Senior Managing Executive Officer and CSO | https://shizune.co/investors/profile/masahito-okuma |

## 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 Junichi Nakajima invest in?

Junichi Nakajima invests primarily in Apps, Big Data and Web Apps startups, most often at Series B and Series C 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 Junichi Nakajima last invest?

The most recent investment recorded for Junichi Nakajima closed in Jan 2021. 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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