MCJ
VC Fund
Kasukabe, Japan
MCJ is a VC fund in Kasukabe focused on Renewable Energy and Energy. MCJ backs extraordinary founders driving the transition of energy and industry and tackling the inevitable impacts of climate change. We discover and invest in startups rewriting industries to be cleaner, more profitable and more resilient. We strengthen our investments through the MCJ Collective — a vetted member network that connects talentedtech and industrial leaders with our portfolio and with one another. Our media platform including the Inevitable podcast spotlights key perspectives critical to our portfolio and the transition at large, reaching tens of thousands of professionals multiple times per week. Learn more at mcj.vc
- Total investments:
- 97
- Last investment:
- Lead investor:
- 0%
Last updated:
For AI agents: llms.txt
Industries MCJ invests in
Stages MCJ invests in
Countries MCJ invests in
Round sizes
Contacts
| Name | Phone | Socials | |
|---|---|---|---|
Round size
- Seed
- $2.6M–$11M
- Series A
- $11M–$38M
- Series B
- $24M–$150M
Investment Focus
Industry
- Renewable Energy 17 (18%)
- Energy 14 (14%)
- Software 10 (10%)
- Sustainability 9 (9%)
- Enterprise Software 6 (6%)
Stage
- Seed 39 (40%)
- Series A 29 (30%)
- Series B 10 (10%)
- Pre-Seed 3 (3%)
- Series C 3 (3%)
Country
- United States 55 (57%)
- United Kingdom 3 (3%)
- Kenya 1 (1%)
- Canada 1 (1%)
- Norway 1 (1%)
Team
| Name | Title | Investments | Links | |
|---|---|---|---|---|
Jason Jacobs
Partner
|
Partner | Total investments: 2 | Find email |
Investments
| Company | Description | Round | Links |
|---|---|---|---|
| Red Metals is a next-generation copper manufacturing startup building America's first domestic high-conductivity copper rod production facility in Charleston, South Carolina. | $10M / Seed / Jun 04, 2026 | ||
| Recheck is the clean business platform for the solar industry. | $2M / Pre-Seed / May 19, 2026 | ||
| Moment is a start-up striving to provide greater access to renewable and reliable energy storage. We create battery units that can be used in a variety of applications. Moment is currently focused on storing energy for off-grid, end of grid customers, and plans on powering remote communities in the future. | $40M / Series B / May 05, 2026 | ||
| DG Matrix innovative solutions unlock gigaton-scale emissions reductions by enabling electrification anywhere and everywhere with less material and a smaller footprint. | $60M / Series A / Feb 18, 2026 | ||
| Archimetis provides an AI-powered operational reasoning system for complex industrial facilities. The platform applies industrial AI and agent-based reasoning to help energy, chemical, pharma, and refinery operators predict failures and optimize processes in real time. Archimetis analyzes plant data from planning to execution to support faster,higher-confidence operational decisions. The system is designed for refineries and process manufacturing environments seeking to reduce downtime and improve throughput. Archimetis also offers demos and implementation support for refinery and process manufacturing teams. | $11.5M / Venture - Series Unknown / Feb 11, 2026 | ||
| Unlimited Industries transforms how critical infrastructure is engineered and delivered, accelerating a future of abundance with AI-powered. | $12M / Seed / Dec 03, 2025 | ||
| Overstory combines AI and advanced satellite imagery to help electric utilities pinpoint and prioritize vegetation risks before they materialize. With Overstory's vegetation intelligence, transmission and distribution operators can make smarter decisions about the vegetation around their power corridors, optimizing resources and improvingoperational efficiency. This helps prevent outages, reduce wildfire risks, and accelerate the transition to a safer, more resilient grid. | $43M / Series B / Nov 25, 2025 | ||
| Hammerhead AI enables AI factory operators to maximize revenue using Reinforcement Learning (RL) agents for power-aware orchestration. | $10M / Seed / Nov 18, 2025 | ||
| Telo Trucks manufactures cleverly designed, compact electric vehicle trucks for city dwellers and weekend adventurers. | $20M / Series A / Sep 23, 2025 | ||
| A geothermal company that plumbs its boreholes with a closed loop | $38M / Series A / Sep 15, 2025 | ||
| See all 97 investments → | |||
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FAQ
What does MCJ invest in?
MCJ invests primarily in Renewable Energy, Energy and Software startups, most often at Seed and Series A stage. Most of the 97 investments tracked by Shizune back companies in United States. The Investment Focus section breaks down every industry, stage and country in the portfolio.
What is MCJ's check size?
MCJ typically joins rounds of $2.6M–$11M at Seed, $11M–$38M at Series A and $24M–$150M at Series B. These ranges are 10th–90th percentile round sizes calculated from confirmed public funding rounds, so they are a realistic guide to the rounds MCJ participates in.
How do I contact MCJ?
Public channels for MCJ include LinkedIn, X (Twitter) and the website linked on this profile. For a verified work email and phone number, create a free Shizune account — contact data is searched across 20+ sources and validated before delivery, so your outreach lands in the right inbox.
Who are the partners at MCJ?
The team at MCJ includes Jason Jacobs (Partner). The Team section lists each member with their title, investment count and links.
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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