# KDDI Green Partners Fund

> KDDI Green Partners Fund is a VC fund backing Energy, Renewable Energy and Clean Energy. See 6 investments, check sizes, portfolio. Updated Aug 2026.

- Type: VC Fund
- Total investments: 6
- Last investment: Jan 2026
- Lead investor: 33%
- Last updated: Aug 2026
- Website: https://www.kddi.com/english/corporate/sustainability/greenfund

KDDI Green Partners Fund is a corporate venture capital firm that invests in firms that address climate change issues.

## Round sizes

| Stage | Round size |
| --- | --- |
| Seed | $10M–$51M |

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Energy | 3 | 50% |
| Renewable Energy | 3 | 50% |
| Clean Energy | 2 | 33% |
| Electrical Distribution | 2 | 33% |
| Local | 1 | 17% |

14 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 2 | 33% |
| Series C | 2 | 33% |
| Series D | 1 | 17% |
| Venture - Series Unknown | 1 | 17% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Japan | 4 | 67% |
| United States | 1 | 17% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Sophia Space | Sophia Space is a space-tech startup building an orbital computing infrastructure. | $10.4M | Seed | Jan 09, 2026 | https://sophia.space |
| ElleThermo | elleThermo aims to implement Semiconductor-Sensitised Thermal Cells (STCs), an energy conversion technology that can generate electricity from unused waste heat above room temperature. | $2.5M | Seed | Sep 05, 2024 | https://ellethermo.studio.site/ |
| Nature | Nature offers a product that enables its users to save money by controlling the use of their air conditioners.The product that the company offers is an air conditioner controller that transforms any window-mounted or through-wall AC into a smart one, equipped with infrared, power control, and sensors that, along with a mobile app for voicesensors, enabling users to operate household appliances with just one smartphone to control their ACs. It transforms the operation of room air conditioners (ACs) to improve comfort and efficiency for consumers while reducing energy demand peaks for utilities with simple, inexpensive, and easy-to-install device.The Boston, Massachusetts-based company was incorporated by Mash Ohtsuka and Haruumi Shiode in 2014. | $7.6M | Series D | Jun 27, 2024 | http://www.nature.global |
| ASUENE | Asuene involves in clean power retail business, retail SaaS business, etc. | $26.7M | Series C | Jun 14, 2024 | https://earthene.com/ |
| Clean Energy Connect | Clean Energy Connect is into offering green energy solutions. It invests in its own generation capacity for a stable electricity supply by not harming nature. |  | Series C | Apr 04, 2024 | https://cleanenergyconnect.jp/ |
| Nature | Nature offers a product that enables its users to save money by controlling the use of their air conditioners.The product that the company offers is an air conditioner controller that transforms any window-mounted or through-wall AC into a smart one, equipped with infrared, power control, and sensors that, along with a mobile app for voicesensors, enabling users to operate household appliances with just one smartphone to control their ACs. It transforms the operation of room air conditioners (ACs) to improve comfort and efficiency for consumers while reducing energy demand peaks for utilities with simple, inexpensive, and easy-to-install device.The Boston, Massachusetts-based company was incorporated by Mash Ohtsuka and Haruumi Shiode in 2014. | $6.9M | Venture - Series Unknown | Feb 07, 2024 | http://www.nature.global |

6 of 6 investments shown.

## Co-investors
- [Energy & Environment Investment](https://shizune.co/investors/profile/energy-environment-investment) — VC Fund, 5 deals together
- [Mitsubishi UFJ Capital](https://shizune.co/investors/profile/mitsubishi-ufj-capital) — VC Fund, 3 deals together
- [ENEOS Innovation Partners](https://shizune.co/investors/profile/eneos-innovation-partners) — VC Fund, 2 deals together
- [Hakuhodo DY Ventures](https://shizune.co/investors/profile/hakuodo-dy-ventures) — VC Fund, 2 deals together
- [Sony Innovation Fund](https://shizune.co/investors/profile/sony-innovation-fund) — VC Fund, 2 deals together
- [SPARX Asset Management](https://shizune.co/investors/profile/sparx-asset-management) — VC Fund, 2 deals together

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## Featured in investor lists
- [Renewable Energy Investors in Japan](https://shizune.co/investors/renewable-energy-investors-japan)
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## FAQ

### What does KDDI Green Partners Fund invest in?

KDDI Green Partners Fund invests primarily in Energy, Renewable Energy and Clean Energy startups, most often at Seed and Series C stage. Most of the 6 investments tracked by Shizune back companies in Japan. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### What is KDDI Green Partners Fund's check size?

KDDI Green Partners Fund typically joins rounds of $10M–$51M at Seed. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds KDDI Green Partners Fund participates in.

### When did KDDI Green Partners Fund last invest?

The most recent investment recorded for KDDI Green Partners Fund closed in Jan 2026. Shizune tracks 6 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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